THE PLESSEY COMPANY LIMITED patents filed

Company number: 00203848


Title Date Filed Status Publication number
Surface acoustic wave transducer 1989-12-16 Terminated GB2239144
Telephone handset 1989-08-22 Terminated GB2235850
Direct frequency synthesizer 1989-07-10 Terminated GB2233847
Hose coupling 1989-04-19 Terminated GB2230832
Voltage-controlled current source 1989-03-31 Terminated GB2230155
Marine cable vibration damper 1988-12-08 Terminated GB2225831
A data synchronisation arrangement 1988-12-08 Terminated GB2228848
Marine body exhibiting low fluid friction 1988-12-08 Terminated GB2225754
Signal current interconnect for ECL/CML logic circuits 1988-11-08 Terminated GB2224610
Underwater acoustic sensor 1988-11-07 Ceased GB2339617
A print head 1988-10-25 Terminated GB2225869
Improvements relating to data transmission systems 1988-10-18 Terminated GB2225464
Protective coating 1988-10-01 Terminated GB2223355
Temperature control of light-emitting devices 1988-08-24 Terminated GB2224374
Integrated injection logic circuit 1988-08-23 Terminated GB2222305
Telephone instrument 1988-08-16 Terminated GB2214761
Coupling waveguides using transverse cylindrical lenses 1988-07-06 Terminated GB2220501
A spectral filter 1988-06-14 Terminated GB2219853
Frequency synthesiser 1988-05-31 Terminated GB2219451
Electro-optic device 1988-05-21 Terminated GB2218822
Transconductance mixer 1988-05-13 Terminated GB2218585
Multichannel radio communication system 1988-05-12 Terminated GB2218597
Acoustic load device 1988-05-12 Terminated GB2218593
Improved stability crystal oscillator 1988-05-11 Terminated GB2218586
Programmable frequency divider 1988-05-05 Terminated GB2218230
Electrical control systems 1988-05-05 Terminated GB2218231
Optical coupler 1988-04-27 Terminated GB2217870
Direct frequency synthesiser 1988-04-07 Terminated GB2217127
A method and apparatus for demultiplexion 1988-01-21 Terminated GB2214756
Noise-controlled frequency-modulation signal detector 1988-01-18 Terminated GB2214742
Environmental protection of superconducting thin films 1987-12-23 Terminated GB2213838
Production of superconducting thin films by ion beam sputtering from a single ceramic target 1987-12-11 Terminated GB2213501
An integrated circuit having a patch array 1987-11-30 Terminated GB2212978
Transportation system having an inter-vehicle distance control arrangement 1987-10-20 Terminated GB2211334
Apparatus by which auxiliary slide-in units are connected toslide-in units 1987-10-20 Ceased GB2211359
A process for soldering a component to a printed circuit board 1987-10-10 Terminated GB2210818
Contents verification apparatus 1987-10-09 Terminated GB2210996
Linear differential amplifier 1987-10-08 Terminated GB2211044
A current switching arrangement 1987-10-08 Terminated GB2211043
Method of alignment of led chips 1987-09-30 Terminated GB2210500
A bi-phase modulator 1987-09-15 Terminated GB2209908
Radiation sensitive resist material 1987-09-09 Terminated GB2209529
Hybrid electrical and non-electrical connector 1987-08-19 Terminated GB2195786
Circuit board back plane assembly with electrical and optical connectors 1987-08-06 Terminated GB2208566
Interconnection highway arrangements 1987-08-06 Ceased GB2209244
A tilting-floor bucket coin escrow 1987-07-15 Terminated GB2206986
Frequency synthesiser with provision for standby mode 1987-07-11 Ceased GB2207309
Gallium arsenide device 1987-07-01 Terminated GB2222304
Logic circuits 1987-06-29 Terminated GB2192319
Photoreactive lenses and pyran compounds 1987-06-15 Terminated GB2193005
Linkwork 1987-06-05 Terminated GB2205375
Telephone instruments 1987-05-08 Terminated GB2191064
Organic optical waveguides 1987-04-24 Ceased GB2189624
A programmable electronic filter 1987-04-01 Terminated GB2189100
Digital divider 1987-03-31 Terminated GB2202974
Polarisation rotator associated with reflective surface 1987-02-26 Terminated GB2203259
Optical switching arrangement 1987-02-10 Terminated GB2201313
Vapour deposited metal films for integrated circuit manufacture 1987-02-10 Terminated GB2204065
Method of producing quartz plate 1986-12-10 Terminated GB2184434
Semiconductor device manufacture 1986-11-19 Terminated GB2200794
Coplanar waveguide probe 1986-11-07 Terminated GB2197081
Microfabrication 1986-11-05 Ceased GB2189480
Digital multiplier 1986-11-01 Terminated GB2199168
Sensor systems for automatically sensing the presence of stationary objects 1986-10-23 Terminated GB2196733
Particulate oxide materials 1986-10-23 Terminated GB2196621
Coherent optical communications systems 1986-10-20 Ceased GB2183055
Frequency synthesiser 1986-10-20 Terminated GB2196455
An arrangement for linking multistage switching matrices 1986-10-15 Terminated GB2196503
Optical network incorporating holographic data storage and processing 1986-10-14 Ceased GB2196146
Optical communications system 1986-10-13 Terminated GB2181921
Frequency alignment circuit and synthesizer therefor 1986-09-30 Terminated GB2181312
Method of treatment for electron resist 1986-08-21 Ceased GB2194242
Integrated circuit devices 1986-08-20 Terminated GB2194388
Bonding integrated circuit devices 1986-08-20 Terminated GB2194387
Balun circuit 1986-08-18 Terminated GB2179801
Conference bridge system 1986-08-15 Terminated GB2194120
Improvements in or relating to fm demodulators 1986-08-15 Ceased GB2179514
A splice protection assembly 1986-08-08 Ceased GB2193603
Optical resonant assembly 1986-08-06 Ceased GB2180360
Efficiency enhanced voltage multiplier 1986-08-02 Terminated GB2193392
Telecommunication exchange equipment incorporating multiparty lines using integrated service digital network techniques 1986-07-31 Terminated GB2193416
Radio interference cancellation circuit 1986-07-17 Terminated GB2192769
Coherent light communication system 1986-06-28 Terminated GB2192109
A process for silicon device isolation 1986-06-17 Terminated GB2194858
Calibrating microwave integrated circuit test systems 1986-06-13 Terminated GB2184849
Scanning radar systems 1986-06-13 Terminated GB2177566
Optical fibre cables 1986-06-12 Terminated GB2191596
Frequency synthesiser 1986-06-11 Ceased GB2188804
Frequency synthesiser 1986-06-06 Terminated GB2191352
Surface-mounting a connector on a printed circuit board 1986-06-03 Terminated GB2176350
Solid propellant burn rate control device 1986-05-21 Terminated GB2190729
Terminal apparatus 1986-05-16 Terminated GB2190566
Screw coupled connectors 1986-05-12 Terminated GB2192035
Improvements in and relating to attenuators 1986-04-30 Ceased GB2193400
Improvements in or relating to electrical contactors 1986-04-25 Ceased GB2189657
Optical assay 1986-04-07 Ceased GB2173895
Improvements relating to data transmission systems 1986-04-07 Ceased GB2188818
An etch technique for metal mask definition 1986-04-01 Terminated GB2189903
Carrier for high frequency integrated circuits 1986-03-21 Terminated GB2188194
Radio communication system 1986-03-21 Terminated GB2188514
Improvements relating to optical fibre light transmission systems 1986-03-17 Terminated GB2188204
Ring bus communications systems 1986-03-17 Terminated GB2188216
Aerial socket assembly 1986-03-14 Terminated GB2187895
Scanning optical microscopes 1986-03-11 Terminated GB2173666
A method of improving the oxidation resistance of graphites 1986-02-28 Terminated GB2187178
Impedance matching circuit for an aerial 1986-02-21 Terminated GB2187042
Electrical connection terminal 1986-02-17 Terminated GB2187047
Vehicle identity detection system 1986-02-07 Terminated GB2186409
Reference circuit 1986-02-07 Terminated GB2186453
Decoding method and apparatus for biphase coded signals 1986-02-06 Ceased GB2171277
Phase and quadrature receiver 1986-01-30 Terminated GB2186139
Beta compensating current source circuit 1986-01-30 Terminated GB2186141
Method for producing integrated circuit interconnects 1986-01-30 Terminated GB2186424
Contact pin 1986-01-30 Terminated GB2186124
Method of fabricating an mos transistor 1986-01-25 Terminated GB2185851
Semiconductor device contact jig 1986-01-24 Ceased GB2185850
Microwave antenna structure 1985-12-24 Terminated GB2184605
Target identification system 1985-12-20 Terminated GB2184627
Sponson launch station 1985-12-13 Terminated GB2184216
Optical temperature sensing apparatus for sensing liquid levels 1985-12-12 Terminated GB2184229
Radio communication apparatus 1985-12-06 Terminated GB2183970
Frequency synthesiser 1985-12-06 Terminated GB2183946
Power supply adaptor 1985-12-06 Terminated GB2183936
Electronic interface circuit 1985-12-04 Terminated GB2185648
Integrated circuit transistor and method for producing same 1985-11-29 Terminated GB2186423
Improvements in or relating to signal connectors 1985-11-06 Terminated GB2167260
Protection structures 1985-10-29 Ceased GB2185621
Digital to analogue converter 1985-10-29 Terminated GB2166614
Improvements relating to bipolar transistors 1985-10-19 Terminated GB2181889
Improvements relating to aerially-deployed structures 1985-10-11 Ceased GB2239081
Missile decoy systems 1985-10-11 Terminated GB2181523
A method of detecting sound impulses 1985-10-05 Terminated GB2181239
Automatically locating the position of a sound source 1985-10-05 Terminated GB2181238
Electro-optical waveguide 1985-10-02 Terminated GB2182158
Spread spectrum radio transmission detection system 1985-09-28 Terminated GB2181024
Acoustic seal 1985-09-21 Ceased GB2180722
Memory cells 1985-09-04 Terminated GB2165410
Method and digital circuit for fixed coefficient serial multiplication 1985-08-28 Terminated GB2179770
Interpolator / decimator filter structure 1985-08-28 Ceased GB2179815
Improvements in or relating to prescalers 1985-08-28 Ceased GB2179774
Recursive digital filter 1985-08-28 Ceased GB2214021
A notch filter 1985-08-28 Ceased GB2216741
Echo canceller 1985-08-15 Ceased GB2164529
Clock signal selection and security arrangements 1985-08-09 Terminated GB2178926
Signal generators 1985-08-09 Terminated GB2178917
Signal conversion circuits 1985-08-09 Terminated GB2218236
Signal conversion circuits 1985-08-09 Terminated GB2178879
Line terminating apparatus 1985-08-09 Ceased GB2178925
Wavelength scanning optical sensor 1985-08-09 Terminated GB2181536
A system of matrix interconnected local area networks 1985-08-01 Ceased GB2166626
A signal converter 1985-07-27 Ceased GB2178577
Switching apparatus 1985-07-05 Terminated GB2163308
Communication apparatus 1985-07-05 Terminated GB2162393
Method and assembly for optical fibre splice protection 1985-06-28 Ceased GB2177230
Cathode ray tube mounting assembly 1985-06-27 Terminated GB2177252
Electrical connectors 1985-06-07 Terminated GB2160145
Locating power source for rail vehicle 1985-06-05 Terminated GB2176963
Underground cable detectors and methods of detecting such cables 1985-04-19 Ceased GB2174203
Forming diffused junctions 1985-04-19 Terminated GB2159662
Lapping jig for optical fibres 1985-04-19 Ceased GB2158750
Digital filters 1985-04-13 Terminated GB2180114
Repeater boxes 1985-04-12 Ceased GB2173647
Improvements relating to electric transformers 1985-03-29 Ceased GB2173956
Travelling-wave field-effect transistor 1985-03-13 Ceased GB2156152
Anisotropic connectors for connecting printed circuit boards 1985-03-06 Terminated GB2159007
Support system 1985-02-19 Ceased GB2171262
Antenna assembly 1985-02-12 Terminated GB2170958
Anisotropic electrical connectors 1985-02-11 Terminated GB2155251
Frequency synthesisers 1985-02-06 Ceased GB2173659
Logic devices 1984-12-21 Terminated GB2168866
Pharmacologically active gamma lactones 1984-12-04 Ceased GB2167744
Amplitude variation suppression arrangements 1984-11-08 Ceased GB2151095
Improvements relating to contact retention arrangements 1984-11-07 Terminated GB2166605
Optical attenuator 1984-10-30 Terminated GB2166257
A method of making diamond heatsink assemblies 1984-10-19 Ceased GB2148157
Improvements in or relating to diamond heatsink assemblies 1984-10-19 Ceased GB2149207
Improvements in diamond heatsink assemblies 1984-10-05 Ceased GB2147738
Tools for connecting wires 1984-10-01 Terminated GB2147241
Electro-optic modulators 1984-09-26 Terminated GB2147115
Cathode ray tube display systems 1984-09-12 Ceased GB2146879
Improvements in diamond heatsink assemblies 1984-09-12 Ceased GB2147145
Cathode ray tube display systems 1984-09-12 Ceased GB2147179
Acousto optic spectrum analysers 1984-09-04 Ceased GB2146766
Telephone conference bridge circuit arrangements 1984-08-29 Terminated GB2146506
Logic circuits 1984-08-23 Ceased GB2149603
Customerisation of integrated logic devices 1984-08-22 Terminated GB2168840
Electrical connectors 1984-08-01 Terminated GB2162700
Frequency modulation detectors 1984-07-27 Terminated GB2151094
Distinguishing different types of movement 1984-07-18 Terminated GB2144599
Surface acoustic wave filters 1984-06-09 Ceased GB2160048
Adaptive line hybrid 1984-05-25 Ceased GB2144304
Mortars 1984-05-23 Terminated GB2160954
Monitoring condition of surface 1984-05-15 Ceased GB2158939
Lamp monitoring apparatus 1984-04-24 Ceased GB2157903
Improvements relating to fuel monitoring systems 1984-04-13 Ceased GB2157429
Aircraft control 1984-04-11 Terminated GB2158610
Through hole interconnections 1984-03-28 Granted GB2156593
Apparatus for testing a printed circuit board 1984-03-24 Ceased GB2156532
Diode 1984-03-05 Granted GB2156148
Rotation measuring devices, tachometers 1984-03-01 Terminated GB2155619
Keyboard push buttons 1984-02-24 Granted GB2135827
Infra-red material structures 1984-02-06 Terminated GB2156383
Isolation of input and output in an integrated injection logic device 1984-01-31 Terminated GB2153588
Improvements relating to semiconductor injection logic devices 1984-01-31 Terminated GB2153587
Improvements relating to variable timing and power storage arrangements 1984-01-25 Ceased GB2153495
Improvements relating to thick film circuits 1984-01-17 Ceased GB2133934
Radar reflector 1984-01-12 Terminated GB2152758
Optical fibre sensing apparatus 1984-01-11 Granted GB2157842
Interferometers 1984-01-05 Terminated GB2152657
Optical fibre apparatus 1983-12-22 Granted GB2133540
Movement detecting apparatus 1983-12-22 Terminated GB2133541
Optical fibre alignment means 1983-12-22 Ceased GB2139780
Microwave device package 1983-12-16 Terminated GB2132413
Apparatus for checking optical fibre 1983-12-13 Granted GB2151351
A transformer 1983-12-08 Ceased GB2151083
Frequency synthesiser 1983-12-02 Terminated GB2150775
Hilbert transform correction system 1983-12-02 Terminated GB2150719
Coatings for semiconductor devices 1983-12-02 Ceased GB2133928
Mounted integrated circuit chip carrier 1983-11-11 Ceased GB2149581
Position detecting apparatus 1983-11-10 Terminated GB2130034
Electric optic light shutter arrangement 1983-10-29 Terminated GB2149134
Material handling and storage system 1983-10-25 Terminated GB2130186
Integrated injection logic device 1983-10-21 Ceased GB2130790
Position detecting apparatus 1983-10-17 Ceased GB2130364
Producing narrow features in electrical devices 1983-10-05 Granted GB2127751
Hinge assembly 1983-09-19 Granted GB2128245
Reverse osmosis liquid filtration apparatus 1983-09-16 Ceased GB2128101
Fsk radio receiver 1983-09-14 Granted GB2146876
Telephone apparatus 1983-09-05 Granted GB2126839
Power control apparatus 1983-09-01 Terminated GB2129631
Jigs for locating electrical components 1983-08-18 Granted GB2146935
Regulated DC power supply 1983-08-04 Terminated GB2125194
A double superhet tuner 1983-07-22 Terminated GB2143691
Phase lock loop circuit 1983-07-13 Terminated GB2143385
Movement measuring apparatus 1983-07-02 Terminated GB2142728
Dust seal 1983-07-02 Ceased GB2142693
Improvements in bipolar transistors 1983-06-17 Terminated GB2141579
Optical arrangements for monitoring refractive index of fluid 1983-06-11 Terminated GB2141223
Temperature measuring arrangement 1983-05-26 Terminated GB2140554
Vehicle mounted doppler radar system 1983-05-19 Ceased GB2122834
Improvements relating to load trip circuits 1983-05-14 Terminated GB2140634
Load tripping circuits 1983-04-29 Terminated GB2140633
Integrated circuit processing method 1983-04-06 Terminated GB2137808
Integrated circuit arrangement 1983-03-24 Granted GB2137411
Improvements in or Relating to Sonar Apparatus 1983-03-01 Terminated GB2136124
Switched mode power supplies 1983-03-01 Terminated GB2136222
Supporting assembly 1983-02-16 Granted GB2115479
Turntable assemblies 1983-02-16 Granted GB2115502
Carbon fibre reinforced composite materials 1983-02-09 Granted GB2116076
Fibre optic light switch 1983-01-07 Terminated GB2133137
Electro-acoustic transducers 1982-12-14 Granted GB2113503
Positioning an optical fibre relative to an opto-electronic device 1982-12-14 Granted GB2131971
Frequency hopping code synchroniser 1982-12-10 Terminated GB2132453
Logarithmic amplifier 1982-12-06 Terminated GB2112242
Switching circuit 1982-12-01 Granted GB2131640
Intra-hop synchroniser 1982-12-01 Terminated GB2132450
A method of sealing a joint 1982-12-01 Terminated GB2115084
Improvements in or relating to radio communication systems 1982-11-25 Terminated GB2111352
A pressure loaded gear pump 1982-11-25 Ceased GB2131091
Liquid spray apparatus 1982-10-26 Granted GB2108869
Improvements relating to optical detecting monitoring or measuring arrangements 1982-10-23 Terminated GB2129930
A switching arrangement 1982-09-30 Terminated GB2128007
Connector arrangements 1982-09-30 Granted GB2107417
Improvements relating to acoustic wave sensing arrangements 1982-09-17 Ceased GB2127168
Material handling and sorting system 1982-08-18 Ceased GB2110448
Improved local area network systems 1982-08-04 Granted GB2125257
An aircraft having launcher means 1982-07-30 Ceased GB2124570
Photochromic materials 1982-07-27 Terminated GB2104539
Frequency synthesiser 1982-07-10 Terminated GB2124047
Keyboards for electrical apparatus 1982-07-06 Terminated GB2103882
Electro-magnetic radiation detecting devices 1982-07-01 Granted GB2103421
Improvements relating to electrical transformers 1982-06-28 Ceased GB2100935
Improvements relating to power control circuits 1982-06-28 Ceased GB2103444
Electrically conductive joint 1982-06-23 Granted GB2104315
Improvements in or relating to detector arrays coupled to a ccd 1982-06-22 Ceased GB2103010
Improvements in or relating to integrated light detection or generation means and amplifying means 1982-06-01 Ceased GB2101807
Interdigital transducer 1982-05-25 Granted GB2120891
Electric push button switch 1982-05-13 Granted GB2100517
Electrical device package 1982-05-10 Granted GB2100521
Optical apparatus 1982-04-29 Granted GB2098352
Electro-optic light shutters 1982-04-24 Terminated GB2135471
Spraying crops 1982-04-13 Granted GB2118011
Mains power measurement 1982-04-13 Ceased GB2118726
Liquid spray apparatus 1982-04-13 Granted GB2118460
Electrical connectors having improved resistance to electrical breakdown 1982-04-03 Terminated GB2119178
Chaff 1982-03-31 Granted GB2112214
Fluid flow control valves 1982-03-26 Granted GB2117491
Digital amplitude modulator 1982-03-26 Terminated GB2118384
Optical fibre connection device comprising a retroreflector 1982-03-22 Ceased GB2099175
Signal generator arrangement 1982-03-17 Ceased GB2118389
Automatic control of manufacture and testing 1982-03-06 Terminated GB2116748
Valves 1982-02-24 Granted GB2115525
Gear pumps 1982-02-24 Granted GB2115875
Improvements in or relating to cable retaining means 1982-02-24 Granted GB2096839
Optical fibre acoustic array 1982-02-23 Granted GB2115171
Improvements in or relating to equipment housings 1982-02-09 Ceased GB2114981
Vehicle park counting equipment 1982-01-25 Terminated GB2114338
Moulding articles with inserts 1981-12-24 Granted GB2112316
Non-contact signal pickup arrangements 1981-12-22 Terminated GB2090986
Electrical connectors for use in telecommunications equipment 1981-12-16 Ceased GB2112216
V.f. receivers for use in digital switching systems 1981-11-12 Ceased GB2111348
Plastics encapsulated electronic devices 1981-10-28 Ceased GB2087159
Acousto-electric transducer 1981-10-15 Ceased GB2107546
Valves 1981-10-15 Terminated GB2107827
Electro-acoustic transducer 1981-10-10 Terminated GB2107545
Controllable oscillator 1981-10-07 Terminated GB2090091
Surface acoustic waveguide 1981-10-07 Terminated GB2091059
Aerial apparatus 1981-10-05 Terminated GB2109637
A rotary positive-displacement pump 1981-09-28 Ceased GB2086480
A self-erecting waveguide antenna 1981-09-22 Ceased GB2106717
Position detecting apparatus 1981-09-11 Terminated GB2084416
Beam steering saw transducer 1981-09-09 Granted GB2110495
Improvements in or relating to assemblies with a movable part 1981-08-21 Granted GB2104144
Improvements in or relating to piezoelectric transducers 1981-08-15 Granted GB2106346
Composite materials 1981-08-11 Ceased GB2205275
A switching circuit 1981-07-16 Terminated GB2105927
A pulse drive circuit 1981-07-16 Terminated GB2102230
Electromagnetic reed relays for mounting on printed circuit boards 1981-07-14 Terminated GB2103015
Switch apparatus 1981-07-11 Ceased GB2101771
Fasteners for a hollow body 1981-06-12 Granted GB2101191
Cash boxes 1981-06-09 Terminated GB2079846
Testing coins 1981-06-08 Ceased GB2078420
A frequency measurement circuit 1981-05-07 Ceased GB2098418
Cable mounting and guiding arrangements 1981-03-21 Granted GB2095199
Triply redundant microprocessor system 1981-02-19 Ceased GB2093614
Machine tool drawbar 1981-02-13 Ceased GB2092922
Intermetallic connector contact finishes 1981-01-30 Terminated GB2069005
Terminations for clad optical fibres 1981-01-28 Terminated GB2068142
Manufacture of carrier strip for electrical contact members 1981-01-16 Granted GB2069377
Aircraft engine emergency fuel system 1981-01-09 Ceased GB2068054
Optical Spectrum Analyser 1980-12-04 Ceased GB2089496
Analogue-to-digital converter 1980-12-03 Granted GB2082410
P.C.M. frame aligner with frame slip characteristic 1980-11-27 Ceased GB2066627
Improvements in or relating to signal selection systems 1980-11-27 Granted GB2089172
Conveyor systems with reduced speed of receptacles at loading stations 1980-10-25 Ceased GB2085830
Electro-optic switching device using the pyroelectric effect 1980-10-23 Granted GB2086072
Drive mechanism for tape cassette 1980-10-23 Terminated GB2067164
Improvements in or relating to separating means for separating two connected components 1980-10-13 Terminated GB2085671
Machine for producing pleated capacitors 1980-09-24 Terminated GB2084626
Electrical conductor terminating structures 1980-09-24 Granted GB2085240
Ultrasonic reflectors 1980-09-10 Terminated GB2083989
Timing recovery for modems 1980-09-04 Ceased GB2061069
Improvements in or relating to transversal equalisers 1980-09-04 Ceased GB2071468
Arrangements for data timing recovery from distorted signals for use in adaptive modems with multi-level coding 1980-09-04 Ceased GB2061041
Zero-crossing comparator with threshold validation 1980-09-04 Granted GB2059725
Digitally controlled wide range automatic gain control 1980-09-04 Ceased GB2059202
Improvements in or relating to optical display devices 1980-09-02 Terminated GB2083650
Improvements Relating to Timing Circuits 1980-08-21 Ceased GB2082862
Improvements in or relating to furnaces for producing semiconductor materials 1980-08-20 Terminated GB2082879
Vibrating cutter for optical fibres 1980-08-20 Granted GB2082565
Time division multiplex module for use in digital switching network 1980-07-31 Terminated GB2105551
Method of Validating Data Stored in Read-Only Memories 1980-07-26 Terminated GB2062309
Logic circuit arrangement 1980-07-23 Terminated GB2081041
Apparatus for placing apertured solder preforms onto pins of electrical connectors 1980-07-18 Granted GB2080262
Improvements in or relating to telephone handsets 1980-07-11 Granted GB2056221
Improvements in or relating to control lever arrangements 1980-07-07 Granted GB2054237
Telephone apparatus 1980-07-07 Granted GB2055019
Cover assemblies for electrical devices 1980-07-07 Granted GB2054968
Improvements in or relating to bells 1980-06-10 Granted GB2078425
Telecommunications line circuit 1980-05-23 Granted GB2055274
Bell assembly 1980-04-09 Granted GB2073931
Remote switch monitoring circuit for mining 1980-03-28 Granted GB2073434
Semiconductor memory element 1980-03-19 Ceased GB2072417
Improvements in or relating to retaining means for elongate members 1980-03-14 Granted GB2071927
Filter arrangement 1980-02-19 Terminated GB2071958
Push button key modules 1980-02-13 Granted GB2077498
Improvements relating to the measurement of temperature 1980-02-08 Terminated GB2045921
Optical cable gland 1980-02-01 Granted GB2043943
Epitaxial growth of garnet films 1980-01-28 Terminated GB2060431
Programmable timed control arrangements 1980-01-24 Terminated GB2069192
Parameter controller 1980-01-24 Terminated GB2068596
Signal monitoring circuit 1980-01-16 Ceased GB2045949
Improvements in or Relating to Digital Filters 1980-01-12 Terminated GB2067799
Acousto-optic deflector 1980-01-11 Terminated GB2069167
Improvements in or relating to spectrum analysers 1980-01-11 Terminated GB2067743
Improvements in or Relating to Spectrum Analysers 1980-01-11 Terminated GB2067745
Digital conference circuits 1979-12-24 Granted GB2040643
Asynchronus receiver for a spread spectrum communication system 1979-12-21 Granted GB2040143
Improvements in or relating to hybrid semiconductor devices 1979-12-20 Ceased GB2039443
>Focus indicator 1979-12-14 Ceased GB2066014
Improvements relating to air filters 1979-11-16 Terminated GB2063095
Codecs 1979-11-14 Ceased GB2040619
Measuring Clearance Gap Between Turbine Blades and Surrounding Duct 1979-11-14 Terminated GB2063477
Improvements in or Relating to Electric Bells 1979-11-08 Terminated GB2062332
Acoustic transducer production for telephones 1979-10-20 Granted GB2062405
Memory protection system using capability registers 1979-09-29 Ceased GB2059652
Data processing system including internal register addressing arrangements 1979-09-29 Ceased GB2062912
Control of fuel/air ratio in i.c. engines 1979-09-15 Terminated GB2059116
Improvements in or relating to phase sequence indicators 1979-09-13 Terminated GB2059078
Semiconductor memory device 1979-09-13 Terminated GB2058451
Fuel injector for an engine 1979-09-11 Granted GB2058210
Method of producing a fuel injector for an engine 1979-09-11 Granted GB2058209
Amplifiers 1979-08-31 Terminated GB2057803
Push button switches 1979-08-31 Terminated GB2057767
Laser treatment of semiconductor material 1979-08-30 Terminated GB2030766
Vehicle speed detectors 1979-08-10 Ceased GB2031683
Field effect structure 1979-07-26 Terminated GB2028582
Method of routining parity checking circuits 1979-07-18 Ceased GB2054326
Scanning Beam Deflection Amplifier 1979-07-10 Terminated GB2053505
A transistorised inverter 1979-07-10 Terminated GB2025166
Improvements in or relating to bell assemblies 1979-07-02 Ceased GB2063545
Demodulators 1979-06-27 Terminated GB2052196
Improvements in or Relating to Couplings 1979-06-15 Granted GB2051279
Directional arrays 1979-06-04 Ceased GB2023940
A liquid control system 1979-05-31 Terminated GB2049999
Rf power indicating arrangement 1979-05-25 Ceased GB2050631
Improvements in or relating to frequency modulators 1979-05-24 Ceased GB2019145
Vibratory atomiser 1979-05-11 Granted GB2024048
Boiler control systems 1979-05-04 Granted GB2036291
Fuel injector 1979-05-03 Granted GB2023724
Optical fibre connectors 1979-05-02 Granted GB2048507
Methods of and apparatus for joining glass objects 1979-04-27 Granted GB2019387
Methods of producing semiconductor materials 1979-04-09 Granted GB2055774
A record player having an automatic record changing facility incorporating manual programming apparatus 1979-03-28 Terminated GB2021842
A record player having a trip mechanism 1979-03-23 Terminated GB2020083
Measurement of acoustic impedance 1979-03-19 Granted GB2020024
Apparatus to supply air and oxygen 1979-03-06 Ceased GB2019042
Rolling diaphragms 1979-03-03 Granted GB2043831
Radar systems 1979-02-26 Terminated GB2029150
Improved method of signalling supervisory information in digital line transmission systems 1979-02-21 Granted GB2016247
Improvements in motor- uniselector arrangements 1979-02-16 Granted GB2020112
Detection of anomalies near a bore 1979-02-15 Terminated GB2042302
Detection of anomalies near a bore 1979-02-10 Terminated GB2042301
Magnetic domain device 1979-02-10 Terminated GB2042293
Encapsulating a Magnetic Domain Component 1979-02-10 Terminated GB2041818
Carbon Fibre Reinforced Composite Materials 1979-02-06 Ceased GB2041342
Aerial systems 1979-02-06 Terminated GB2042808
Improvements in or relating to aluminium oxide films for capacitors 1979-02-06 Terminated GB2041647
Frequency synthesis control system 1979-02-05 Granted GB2015837
Improvements in or relating to sealing optical fibres into packages. 1979-01-26 Granted GB2022280
Illumination apparatus 1979-01-26 Ceased GB2013323
A Variable Displacement Pump 1979-01-23 Terminated GB2040508
Coupling Optical Fibres 1979-01-17 Ceased GB2019028
A two or four pole A.C. motor 1979-01-17 Terminated GB2013986
Improvements in error correction devices 1979-01-15 Ceased GB2013002
Improvements in or relating to optical detecting arrangements 1979-01-15 Terminated GB2013332
Storage cabinets 1979-01-08 Granted GB2041726
Dial units for telephone sets 1979-01-08 Terminated GB2048015
Heterostructure field effect transistors 1979-01-04 Terminated GB2012480
Line current feed and hybrid arrangement (system X) 1978-12-30 Granted GB2042848
Balance on 2-4 wire hybrid circuits 1978-12-30 Granted GB2041700
Real-time data processing system for processing time period commands 1978-12-22 Ceased GB2030331
Low pressure fuel injection system 1978-12-20 Granted GB2012357
Optical fibre connectors 1978-12-16 Granted GB2039074
Improvements Relating to Electric Terminal Members 1978-12-08 Terminated GB2037494
Improvements in or relating to magnetic domain devices 1978-12-08 Terminated GB2011744
Open-phase detector 1978-11-30 Granted GB2035728
Improvements in or relating to packaging arrangements 1978-11-30 Terminated GB2011727
Optical positioning apparatus 1978-11-29 Ceased GB2035595
Push button switch 1978-11-17 Terminated GB2023933
Improvements in or Relating to Electro-optic Modulators 1978-11-17 Terminated GB2008786
Holographic Data Store 1978-11-17 Terminated GB2008790
Power amplifier arrangement 1978-11-15 Terminated GB2011741
Frequency synthesizer 1978-11-15 Ceased GB2015277
Analogui-to-digital converters 1978-11-10 Ceased GB2007052
Motor Speed Detector 1978-11-03 Terminated GB2008768
Bell volume control 1978-11-02 Granted GB2033640
Synthesis arrangements for use in digital data transmission systems 1978-10-30 Ceased GB2011223
Electromagnetic hinged armature devices 1978-10-27 Granted GB2007915
Television receiver IF and detector arrangement 1978-10-27 Terminated GB2009546
Optical fibre switches 1978-10-14 Granted GB2031603
Circuit arrangement 1978-10-13 Ceased GB2007055
Selectively displaying a two- dimensional configuration 1978-10-11 Terminated GB2031209
Optical fibre connector 1978-10-10 Ceased GB2005047
Fluid pressure operated piezoelectric generators 1978-10-02 Granted GB2010597
Surface acoustic wave filters 1978-09-25 Ceased GB2030411
Hydraulic variable displacement axial piston pump having torque limiation 1978-09-20 Granted GB2008804
Improvements in or relating to display arrangements 1978-09-19 Terminated GB2011765
Improvements in or relating to memory systems 1978-09-19 Terminated GB2011666
Receiver arrangement 1978-09-15 Ceased GB2030018
Gear pump 1978-09-15 Granted GB2029902
Improvements relating to circuit protection arrangement 1978-09-06 Terminated GB2034134
Receiver circuit arrangement 1978-09-04 Ceased GB2004428
Deposition of material on a substrate 1978-08-17 Terminated GB2003660
Manufacturing field effect transistors 1978-08-17 Terminated GB2005913
Article dispensers 1978-08-05 Granted GB2026984
Field effect transistor 1978-08-03 Terminated GB2003658
Improvements in or relating to holographic data storage systems 1978-07-31 Terminated GB2002919
Improvements in or relating to suppressor circuits 1978-07-25 Terminated GB2005966
Improvement in or relating to detector arrangements 1978-07-25 Terminated GB2003368
Guide systems 1978-07-19 Terminated GB2001923
Aerial systems 1978-07-12 Granted GB2001804
Technique for embedding pressure-sensitive cables in a road surface to minimise mechanical resonance 1978-07-06 Ceased GB2003635
Prisms 1978-06-29 Terminated GB2001775
Radiation detectors 1978-06-29 Granted GB2001750
A fluid cooled heat exchanger system 1978-06-20 Terminated GB2039360





Disputes Register Do you have a dispute with a company? File it on www.disputesregister.org
Do you have a dispute with a business?
Make it public