Inventor · disambiguated record
Richard E. Epworth
Also filed as: EPWORTH RICHARD · EPWORTH RICHARD E · EPWORTH RICHARD EDWARD
53 granted patents·2 pending applications·2,324 citations·filing 1976–2004
99Inventor score
Files withNORTEL NETWORKS LTD21NORTHERN TELECOM LTD14STC PLC8INT STANDARD ELECTRIC CORP7NORTEL NETWORKS CORP2
Top patents by PatentIndex Score
55 records- 0198US6271952B1Polarization mode dispersion compensationNORTEL NETWORKS LTD·Filed 1998·Granted Aug 7, 2001·328 cites·51 claims
- 0298US4533247AOptical transmission systemINT STANDARD ELECTRIC CORP·Filed 1982·Granted Aug 6, 1985·198 cites·12 claims
- 0396US4561119AOptical frequency modulation systemINT STANDARD ELECTRIC CORP·Filed 1982·Granted Dec 24, 1985·141 cites·12 claims
- 0493US5117196AOptical amplifier gain controlSTC PLC·Filed 1990·Granted May 26, 1992·89 cites·9 claims
- 0591US6381388B1Chromatic dispersion compensationNORTEL NETWORKS LTD·Filed 2000·Granted Apr 30, 2002·52 cites·8 claims
- 0691US5777773AOptical frequency control system and methodNORTHERN TELECOM LTD·Filed 1996·Granted Jul 7, 1998·131 cites·25 claims
- 0791US5452116ATransmission systems incorporating optical amplifiersNORTHERN TELECOM LTD·Filed 1994·Granted Sep 19, 1995·103 cites·5 claims
- 0891US4953939AOptical fibre transmission systemsSTC PLC·Filed 1987·Granted Sep 4, 1990·80 cites·17 claims
- 0990US6522436B2Multiplexed transmission of optical signalsNORTEL NETWORKS LTD·Filed 2001·Granted Feb 18, 2003·31 cites·14 claims
- 1090US5463487AOptical transmission systemNORTHERN TELECOM LTD·Filed 1994·Granted Oct 31, 1995·96 cites·5 claims
- 1187US5949560AOptical transmission systemNORTHERN TELECOM LTD·Filed 1997·Granted Sep 7, 1999·115 cites·53 claims
- 1286US7580630B2Spectral shaping for optical OFDM transmissionNORTEL NETWORKS LTD·Filed 2004·Granted Aug 25, 2009·42 cites·26 claims
- 1385US7209670B2Polarization diversity receiver for optical transmission systemNORTEL NETWORKS LTD·Filed 2003·Granted Apr 24, 2007·32 cites·23 claims
- 1484US7085501B1Coherent optical receiverNORTEL NETWORKS LTD·Filed 2002·Granted Aug 1, 2006·28 cites·17 claims
- 1584US4718121ABalanced coherent receiverSTC PLC·Filed 1986·Granted Jan 5, 1988·61 cites·6 claims
- 1680US4144504APlanar laser mountINT STANDARD ELECTRIC CORP·Filed 1977·Granted Mar 13, 1979·37 cites·7 claims
- 1777US7136558B2Optical waveguideNORTEL NETWORKS LTD·Filed 2003·Granted Nov 14, 2006·18 cites·24 claims
- 1877US6313932B1Multiplexed transmission of optical signalsNORTEL NETWORKS LTD·Filed 1998·Granted Nov 6, 2001·44 cites·12 claims
- 1976US5715265ADispersion compensationNORTHERN TELECOM LTD·Filed 1996·Granted Feb 3, 1998·43 cites·4 claims
- 2075US7272327B2Multi-detector detection of optical signalsNORTEL NETWORKS LTD·Filed 2003·Granted Sep 18, 2007·16 cites·21 claims
- 2173US6519390B2Chirped Bragg grating reflectors and adjustable dispersion apparatus incorporating such gratingsNORTEL NETWORKS LTD·Filed 2000·Granted Feb 11, 2003·13 cites·46 claims
- 2273US5828689AEtalon arrangementNORTHERN TELECOM LTD·Filed 1997·Granted Oct 27, 1998·37 cites·12 claims
- 2373US5602949AChirped distributed Bragg grating optical fibre filtersNORTHERN TELECOM LTD·Filed 1996·Granted Feb 11, 1997·38 cites·2 claims
- 2470US7315584B1Coherent receiverNORTEL NETWORKS LTD·Filed 2003·Granted Jan 1, 2008·15 cites·38 claims
- 2570US6526208B1Dispersion managed fiber optic cable and systemNORTEL NETWORKS LTD·Filed 2000·Granted Feb 25, 2003·17 cites·15 claims
- 2670US6483632B1Multistage optical amplifier with gain flatteningNORTEL NETWORKS LTD·Filed 1997·Granted Nov 19, 2002·37 cites·16 claims
- 2768US4781428ADevices and methods for selectively tapping optical energy from an optical fibreSTC PLC·Filed 1985·Granted Nov 1, 1988·28 cites·11 claims
- 2867US4749246AOptical fiber sensorsSTC PLC·Filed 1987·Granted Jun 7, 1988·20 cites·10 claims
- 2966US5608571AOptical amplifiersNORTHERN TELECOM LTD·Filed 1995·Granted Mar 4, 1997·42 cites·10 claims
- 3065US6130899ALaser assemblyNORTEL NETWORKS CORP·Filed 1996·Granted Oct 10, 2000·26 cites·6 claims
- 3163US6626589B1Optical packet switchingNORTEL NETWORKS LTD·Filed 1999·Granted Sep 30, 2003·23 cites·25 claims
- 3263US5513030AOptical pulse retiming and reshaping circuitNORTHERN TELECOM LTD·Filed 1993·Granted Apr 30, 1996·31 cites·20 claims
- 3362US6381385B1Polarization mode dispersion emulationNORTEL NETWORKS LTD·Filed 1999·Granted Apr 30, 2002·32 cites·26 claims
- 3462US6144783AOptical multiplexter/demultiplexerNORTEL NETWORKS CORP·Filed 1997·Granted Nov 7, 2000·26 cites·13 claims
- 3561US6559991B1Polarization mode dispersion compensationNORTEL NETWORKS LTD·Filed 1999·Granted May 6, 2003·31 cites·16 claims
- 3661US5619603AMethod of creating bragg gratings in waveguidesNORTHERN TELECOM LTD·Filed 1995·Granted Apr 8, 1997·20 cites·10 claims
- 3760US6483620B1Polarization mode dispersion measurementNORTEL NETWORKS LTD·Filed 1999·Granted Nov 19, 2002·28 cites·4 claims
- 3859US6859586B23 Fibre I and Q couplerNORTEL NETWORKS LTD·Filed 2002·Granted Feb 22, 2005·6 cites·12 claims
- 3958US6894829B2Optical amplifier modulesNORTEL NETWORKS LTD·Filed 2002·Granted May 17, 2005·4 cites·41 claims
- 4058US4761833AOptical fibre networkSTC PLC·Filed 1986·Granted Aug 2, 1988·18 cites·8 claims
- 4155US5523874AOptical soliton pulse transmission systemNORTHERN TELECOM LTD·Filed 1993·Granted Jun 4, 1996·22 cites·12 claims
- 4255US5080505AOptical transmission systemSTC PLC·Filed 1990·Granted Jan 14, 1992·23 cites·6 claims
- 4351US4625305AMultiplexing of optical signalsINT STANDARD ELECTRIC CORP·Filed 1982·Granted Nov 25, 1986·12 cites·14 claims
- 4451US4238648ATermination for telecommunication pathINT STANDARD ELECTRIC CORP·Filed 1979·Granted Dec 9, 1980·9 cites·5 claims
- 4550US5828681AWavelength control of data-modulated lasers and method using sameNORTHERN TELECOM LTD·Filed 1996·Granted Oct 27, 1998·14 cites·14 claims
- 4650US4097891ALaser stud mountsINT STANDARD ELECTRIC CORP·Filed 1976·Granted Jun 27, 1978·15 cites·8 claims
- 4746US5287366ABinary modulation of injection lasersNORTHERN TELECOM EUROP LTD·Filed 1992·Granted Feb 15, 1994·10 cites·19 claims
- 4844US2005074037A1Optical sub-carrier multiplexed transmissionFiled 2003·Application pending·0 cites
- 4943US5737459ALoss interferometric power combiner comprising a feedback circuitNORTHERN TELECOM LTD·Filed 1995·Granted Apr 7, 1998·11 cites·16 claims
- 5041US4898443ACoherent mixing of optical signalsSTC PLC·Filed 1988·Granted Feb 6, 1990·9 cites·17 claims
Showing the top 50 of 55 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →