Inventor · disambiguated record
Shigeyuki Akiba
Also filed as: AKIBA SHIGEYUKI · SAKAI KAZUO
83 granted patents·2,412 citations·filing 1978–2003
99Inventor score
Files withKOKUSAI DENSHIN DENWA CO LTD75KDD CORP3MITSUBISHI ELECTRIC CORP3KUKUSAI DENSHIN DENWA KABUSHIK1KUKUSAI DENSHIN DENWA KK1
Top patents by PatentIndex Score
83 records- 0198US4720835AIntegrated semiconductor light emitting element with oscillation wavelength and phase modulated light outputKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Jan 19, 1988·156 cites·12 claims
- 0295US6005702AOptical transmission device, WDM optical transmission apparatus, and optical transmission system using return-to-zero optical pulsesKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Dec 21, 1999·135 cites·20 claims
- 0393US5790289AWDM optical communication method with pre-emphasis technique and an apparatus thereforKOKUSAI DENSHIN DENWA CO LTD·Filed 1996·Granted Aug 4, 1998·116 cites·14 claims
- 0490US5786918AOptical communication system and optical transmitting deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted Jul 28, 1998·119 cites·13 claims
- 0589US5822095AOptical add-drop multiplexerKOKUSAI DENSHIN DENWA CO LTD·Filed 1996·Granted Oct 13, 1998·115 cites·5 claims
- 0689US4653058ADistributed feedback semiconductor laser with monitorKOKUSAI DENSHIN DENWA CO LTD·Filed 1983·Granted Mar 24, 1987·35 cites·10 claims
- 0786US4811352ASemiconductor integrated light emitting deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Mar 7, 1989·36 cites·3 claims
- 0886US4573161ASemiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1983·Granted Feb 25, 1986·29 cites·2 claims
- 0985US4660934AMethod for manufacturing diffraction gratingKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Apr 28, 1987·54 cites·9 claims
- 1084US5625479ASoliton optical communication system and optical transmitter and optical receiver thereforKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted Apr 29, 1997·52 cites·10 claims
- 1184US4932034ADistributed feedback semiconductor laser device and current injectionKOKUSAI DENSHIN DENWA CO LTD·Filed 1989·Granted Jun 5, 1990·32 cites·12 claims
- 1284US4796274ASemiconductor device with distributed bragg reflectorKOKUSAI DENSHIN DENWA CO LTD·Filed 1987·Granted Jan 3, 1989·32 cites·11 claims
- 1382US5589969AWavelength division multiplexed optical fiber transmission equipmentKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted Dec 31, 1996·58 cites·5 claims
- 1481US5710660AGain-controllable optical amplifier and optical gain-control methodKOKUSAI DENSHIN DENWA CO LTD·Filed 1996·Granted Jan 20, 1998·53 cites·25 claims
- 1581US4820655AMethod for manufacturing semiconductor optical integrated device with optical waveguide regionsKOKUSAI DENSHIN DENWA CO LTD·Filed 1987·Granted Apr 11, 1989·30 cites·1 claims
- 1680US4682196AMulti-layered semi-conductor photodetectorKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Jul 21, 1987·39 cites·3 claims
- 1779US4874216AVariable-waveguide optical branching filterKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Oct 17, 1989·38 cites·7 claims
- 1877US5559910AWavelength division multiplexed optical fiber transmission equiptmentKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted Sep 24, 1996·57 cites·8 claims
- 1976US4340966ASemiconductor laser with buffer layerKOKUSAI DENSHIN DENWA CO LTD·Filed 1980·Granted Jul 20, 1982·24 cites·2 claims
- 2075US6160649AOptical power measuring system terminal station and repeater thereforKOKUSAI DENSHIN DENWA CO LTD·Filed 1998·Granted Dec 12, 2000·52 cites·36 claims
- 2174US6181449B1Wavelength division multiplexed optical processing device and optical communication transmission pathKOKUSAI DENSHIN DENWA CO LTD·Filed 1998·Granted Jan 30, 2001·46 cites·25 claims
- 2274US4743087AOptical external modulation semiconductor elementKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted May 10, 1988·21 cites·8 claims
- 2374US4573158ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Feb 25, 1986·21 cites·4 claims
- 2473US6556325B1Optical repeater monitoring system and a method thereofKDD CORP·Filed 2000·Granted Apr 29, 2003·14 cites·34 claims
- 2573US5912750AOptical transmission lineKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Jun 15, 1999·40 cites·4 claims
- 2672US5585954AApparatus for measuring optical transmission characteristicKOKUSAI DENSHIN DENWA CO LTD·Filed 1994·Granted Dec 17, 1996·46 cites·2 claims
- 2771US6091538AGain equalizing apparatusKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Jul 18, 2000·33 cites·10 claims
- 2871US5898714AOptical pulse generatorKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Apr 27, 1999·34 cites·6 claims
- 2971US4773075ALight emitting deviceKUKUSAI DENSHIN DENWA KK·Filed 1986·Granted Sep 20, 1988·21 cites·11 claims
- 3070US4918496AInfrared emitting device with dislocation free layerKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Apr 17, 1990·17 cites·7 claims
- 3170US4815090ADistributed feedback semiconductor laser with monitorKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Mar 21, 1989·17 cites·6 claims
- 3269US5926300AOptical add-drop multiplexerKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Jul 20, 1999·33 cites·10 claims
- 3369US5642215AOptical transmission systemKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted Jun 24, 1997·42 cites·6 claims
- 3469US5629795AOptical amplifying-repeating transmission systemKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted May 13, 1997·41 cites·6 claims
- 3568US4701930ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Oct 20, 1987·16 cites·3 claims
- 3667US6021235AWavelength-division multiplexing optical transmission systemKOKUSAI DENSHIN DENWA CO LTD·Filed 1998·Granted Feb 1, 2000·35 cites·20 claims
- 3766US6188508B1Control signal superimposerKDD CORP·Filed 1999·Granted Feb 13, 2001·35 cites·13 claims
- 3866US5790294ALine monitoring method and line monitoring apparatusKUKUSAI DENSHIN DENWA KABUSHIK·Filed 1996·Granted Aug 4, 1998·41 cites·11 claims
- 3966US5574590AOptical amplifying transmitting systemKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted Nov 12, 1996·36 cites·10 claims
- 4065US5872647AOptical transmitting terminalKOKUSAI DENSHIN DENWA CO LTD·Filed 1996·Granted Feb 16, 1999·32 cites·6 claims
- 4164US5889607AOptical modulator, optical short pulse generating device, optical waveform shaping device, and optical demultiplexer deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Mar 30, 1999·32 cites·8 claims
- 4264US4731641AAvalanche photo diode with quantum well layerKOKUSAI DENSHIN DENWA CO LTD·Filed 1986·Granted Mar 15, 1988·19 cites·4 claims
- 4363US5019519AMethod for the manufacture of optical semiconductor deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1989·Granted May 28, 1991·27 cites·3 claims
- 4462US6614588B1Optical amplifier having various control circuitryMITSUBISHI ELECTRIC CORP·Filed 2000·Granted Sep 2, 2003·6 cites·17 claims
- 4562US5430795AOptical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuitKOKUSAI DENSHIN DENWA CO LTD·Filed 1993·Granted Jul 4, 1995·31 cites·8 claims
- 4660US5920413AMethod and device for optical add/drop multiplexing using high speed polarization scramblerKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Jul 6, 1999·23 cites·18 claims
- 4760US5122844AQuantum well structure and semiconductor device using the sameKOKUSAI DENSHIN DENWA CO LTD·Filed 1991·Granted Jun 16, 1992·20 cites·10 claims
- 4859US4913506AOptical modulation deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1989·Granted Apr 3, 1990·16 cites·14 claims
- 4959US4653059ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Mar 24, 1987·12 cites·4 claims
- 5057US5892608AOptical receiver device for dark soliton lightwaveKOKUSAI DENSHIN DENWA CO LTD·Filed 1996·Granted Apr 6, 1999·15 cites·2 claims
Showing the top 50 of 83 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →