Assignee
POST OFFICE
GB·154 granted patents·3,170 citations·filing 1973–1999
Top patents by PatentIndex Score
154 records- 0196US4125768AApparatus for launching or detecting waves of selected modes in an optical dielectric waveguidePOST OFFICE·Filed 1977·Granted Nov 14, 1978·209 cites·12 claims
- 0293US4346601ATesting glass fibresPOST OFFICE·Filed 1980·Granted Aug 31, 1982·88 cites·12 claims
- 0392US4027331ADigital television systemPOST OFFICE·Filed 1975·Granted May 31, 1977·124 cites·15 claims
- 0491US4500116AIdentification matterPOST OFFICE·Filed 1980·Granted Feb 19, 1985·78 cites·7 claims
- 0591US4278835ASubmarine communication cable including optical fibres within an electrically conductive tubePOST OFFICE·Filed 1978·Granted Jul 14, 1981·66 cites·3 claims
- 0690US4309671AControl apparatusPOST OFFICE·Filed 1980·Granted Jan 5, 1982·77 cites·8 claims
- 0789US4452506ACoupling of dielectric optical waveguidesPOST OFFICE·Filed 1980·Granted Jun 5, 1984·63 cites·10 claims
- 0889US4237339AAudio teleconferencingPOST OFFICE·Filed 1978·Granted Dec 2, 1980·87 cites·19 claims
- 0987US4456331AImproved communications cable with lines of weaknessPOST OFFICE·Filed 1982·Granted Jun 26, 1984·78 cites·4 claims
- 1087US4166985AInjection laser stabilizationPOST OFFICE·Filed 1977·Granted Sep 4, 1979·30 cites·13 claims
- 1187US4038489ACablesPOST OFFICE·Filed 1975·Granted Jul 26, 1977·110 cites·6 claims
- 1286US4509635ASorting systemPOST OFFICE·Filed 1983·Granted Apr 9, 1985·111 cites·12 claims
- 1385US4125658AApparatus for use in drawing or marking graphic characters on a surfacePOST OFFICE·Filed 1976·Granted Nov 14, 1978·53 cites·10 claims
- 1484US3970795AMeasurement of noise in a communication channelPOST OFFICE·Filed 1974·Granted Jul 20, 1976·48 cites·4 claims
- 1582US4873662AInformation handling system and terminal apparatus thereforPOST OFFICE·Filed 1980·Granted Oct 10, 1989·90 cites·7 claims
- 1682US4456789AAudio teleconferencingPOST OFFICE·Filed 1979·Granted Jun 26, 1984·33 cites·14 claims
- 1782US4128140AApparatus for recycling engine lubricating oilPOST OFFICE·Filed 1977·Granted Dec 5, 1978·57 cites·6 claims
- 1882US4124825ASignal level stabilizerPOST OFFICE·Filed 1977·Granted Nov 7, 1978·37 cites·10 claims
- 1981US4181515AMethod of making dielectric optical waveguidesPOST OFFICE·Filed 1977·Granted Jan 1, 1980·25 cites·9 claims
- 2081US4168212ADetermining semiconductor characteristicPOST OFFICE·Filed 1978·Granted Sep 18, 1979·44 cites·5 claims
- 2179US4147997AActive filters utilizing networks of resistors and negative impedance convertersPOST OFFICE·Filed 1977·Granted Apr 3, 1979·21 cites·11 claims
- 2278US4060138AVibratory toolsPOST OFFICE·Filed 1976·Granted Nov 29, 1977·32 cites·11 claims
- 2378US4040807ADrawing dielectric optical waveguidesPOST OFFICE·Filed 1975·Granted Aug 9, 1977·25 cites·16 claims
- 2478US3999835ADielectric optical waveguidesPOST OFFICE·Filed 1974·Granted Dec 28, 1976·22 cites·3 claims
- 2577US6227378B1Sorting system for groups of items having recirculationPOST OFFICE·Filed 1999·Granted May 8, 2001·75 cites·13 claims
- 2677US4059727AData transmission system between telephone subscriber location and telephone exchange location during idle telephone conditionPOST OFFICE·Filed 1977·Granted Nov 22, 1977·23 cites·15 claims
- 2777US3982075ASynchronization system for time division multiple access relay communications systemPOST OFFICE·Filed 1974·Granted Sep 21, 1976·36 cites·31 claims
- 2877US3957342ASodium borosilicate glasses for dielectric optical waveguidesPOST OFFICE·Filed 1975·Granted May 18, 1976·30 cites·5 claims
- 2976US4154783AProcess for producing dielectric optical waveguidesPOST OFFICE·Filed 1977·Granted May 15, 1979·27 cites·4 claims
- 3076US3930714AMethod of manufacturing an optical fibre light waveguidePOST OFFICE·Filed 1973·Granted Jan 6, 1976·16 cites·4 claims
- 3175US4127370AApparatus for forming dielectric optical waveguidesPOST OFFICE·Filed 1977·Granted Nov 28, 1978·26 cites·16 claims
- 3273US4021619AImproved digital telephone and switching system employing time division multiplex pulse code modulationPOST OFFICE·Filed 1975·Granted May 3, 1977·15 cites·8 claims
- 3372US4262283ASystem for transmitting alarm information over telephone linesPOST OFFICE·Filed 1978·Granted Apr 14, 1981·32 cites·32 claims
- 3472US4151030AMethod for jointing of dielectric optical waveguidesPOST OFFICE·Filed 1977·Granted Apr 24, 1979·26 cites·10 claims
- 3572US4036419ASevering apparatusPOST OFFICE·Filed 1976·Granted Jul 19, 1977·26 cites·11 claims
- 3671US5010998ADiverterPOST OFFICE·Filed 1989·Granted Apr 30, 1991·34 cites·8 claims
- 3771US4497536ACoupling of dielectric optical waveguidesPOST OFFICE·Filed 1983·Granted Feb 5, 1985·24 cites·16 claims
- 3871US4430733ASwitching of digital signalsPOST OFFICE·Filed 1978·Granted Feb 7, 1984·13 cites·24 claims
- 3971US4102717ADielectric optical waveguide couplingsPOST OFFICE·Filed 1976·Granted Jul 25, 1978·25 cites·21 claims
- 4071US4093825AData transmission systemPOST OFFICE·Filed 1977·Granted Jun 6, 1978·18 cites·17 claims
- 4169US4417387AGold metallization in semiconductor devicesPOST OFFICE·Filed 1981·Granted Nov 29, 1983·34 cites·9 claims
- 4269US4312566ADielectric optical waveguide cablesPOST OFFICE·Filed 1979·Granted Jan 26, 1982·23 cites·7 claims
- 4369US4193121AInformation handling apparatus having multiple ports distributed around shifting register ringsPOST OFFICE·Filed 1977·Granted Mar 11, 1980·38 cites·7 claims
- 4468US4074228AError correction of digital signalsPOST OFFICE·Filed 1976·Granted Feb 14, 1978·32 cites·25 claims
- 4567US4308503APhase shift keyed demodulator using recovered carrier with controlled phase offsetPOST OFFICE·Filed 1979·Granted Dec 29, 1981·19 cites·8 claims
- 4667US4203009AUnbalanced/balanced converter circuitsPOST OFFICE·Filed 1978·Granted May 13, 1980·22 cites·14 claims
- 4766US4077699AOptical devicesPOST OFFICE·Filed 1975·Granted Mar 7, 1978·15 cites·11 claims
- 4865US4209773ACode convertersPOST OFFICE·Filed 1977·Granted Jun 24, 1980·25 cites·5 claims
- 4964US4410567AOptical fibres and coatings thereforPOST OFFICE·Filed 1982·Granted Oct 18, 1983·19 cites·14 claims
- 5064US4158184AElectrical filter networksPOST OFFICE·Filed 1977·Granted Jun 12, 1979·19 cites·11 claims
Showing the top 50 of 154 patent records by PatentIndex Score.
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