Inventor · disambiguated record
Yuichi Matsushima
Also filed as: MATSUSHIMA YUICHI
48 granted patents·1 pending application·1,033 citations·filing 1980–2002
99Inventor score
Files withKOKUSAI DENSHIN DENWA CO LTD43KDD CORP3KOKUSAI DENSIN DENWA KABUSIKI1TOPPAN PRINTING CO LTD1
Top patents by PatentIndex Score
49 records- 0194US5434693AOptical short pulse generating deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1994·Granted Jul 18, 1995·141 cites·3 claims
- 0289US4653058ADistributed feedback semiconductor laser with monitorKOKUSAI DENSHIN DENWA CO LTD·Filed 1983·Granted Mar 24, 1987·35 cites·10 claims
- 0387US5315422AOptical Mach-Zehnder type logic element which performs an XOR operationKOKUSAI DENSHIN DENWA CO LTD·Filed 1993·Granted May 24, 1994·76 cites·4 claims
- 0486US4573161ASemiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1983·Granted Feb 25, 1986·29 cites·2 claims
- 0585US4660934AMethod for manufacturing diffraction gratingKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Apr 28, 1987·54 cites·9 claims
- 0684US4932034ADistributed feedback semiconductor laser device and current injectionKOKUSAI DENSHIN DENWA CO LTD·Filed 1989·Granted Jun 5, 1990·32 cites·12 claims
- 0780US4682196AMulti-layered semi-conductor photodetectorKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Jul 21, 1987·39 cites·3 claims
- 0879US4874216AVariable-waveguide optical branching filterKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Oct 17, 1989·38 cites·7 claims
- 0973US5306924ASemiconductor device with strained-layer superlatticeKOKUSAI DENSHIN DENWA CO LTD·Filed 1993·Granted Apr 26, 1994·34 cites·2 claims
- 1072US5394260AOptical pulse generatorKOKUSAI DENSHIN DENWA CO LTD·Filed 1993·Granted Feb 28, 1995·31 cites·14 claims
- 1172US4852108AWavelength tunable semiconductor laser with narrow band-pass active filter regionKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Jul 25, 1989·19 cites·3 claims
- 1271US4805975AOptical waveguide switchKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Feb 21, 1989·28 cites·12 claims
- 1370US4918496AInfrared emitting device with dislocation free layerKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Apr 17, 1990·17 cites·7 claims
- 1470US4815090ADistributed feedback semiconductor laser with monitorKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Mar 21, 1989·17 cites·6 claims
- 1569US5798856AOptical pulse generatorKOKUSAI DENSHIN DENWA CO LTD·Filed 1994·Granted Aug 25, 1998·27 cites·5 claims
- 1669US5392306AMultiple quantum well structure and semiconductor device using the sameKOKUSAI DENSHIN DENWA CO LTD·Filed 1993·Granted Feb 21, 1995·33 cites·3 claims
- 1768US4701930ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Oct 20, 1987·16 cites·3 claims
- 1864US4731641AAvalanche photo diode with quantum well layerKOKUSAI DENSHIN DENWA CO LTD·Filed 1986·Granted Mar 15, 1988·19 cites·4 claims
- 1962US5187717ATunable semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1991·Granted Feb 16, 1993·20 cites·2 claims
- 2061US5859941AOptical add/drop multiplexer deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1996·Granted Jan 12, 1999·25 cites·27 claims
- 2160US5122844AQuantum well structure and semiconductor device using the sameKOKUSAI DENSHIN DENWA CO LTD·Filed 1991·Granted Jun 16, 1992·20 cites·10 claims
- 2259US4653059ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1985·Granted Mar 24, 1987·12 cites·4 claims
- 2358US6084997ACoupled waveguide structureKOKUSAI DENSHIN DENWA CO LTD·Filed 1998·Granted Jul 4, 2000·20 cites·6 claims
- 2458US4795225ASemiconductor optical switchKOKUSAI DENSHIN DENWA CO LTD·Filed 1988·Granted Jan 3, 1989·18 cites·4 claims
- 2557US5401957AOptical waveform shaping device for peforming waveform equalization and timing synchronizationKOKUSAI DENSHIN DENWA CO LTD·Filed 1994·Granted Mar 28, 1995·25 cites·6 claims
- 2656US4665527ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1984·Granted May 12, 1987·10 cites·4 claims
- 2756US4553239ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1983·Granted Nov 12, 1985·10 cites·4 claims
- 2854US4761383AMethod of manufacturing avalanche photo diodeKOKUSAI DENSHIN DENWA CO LTD·Filed 1987·Granted Aug 2, 1988·11 cites·3 claims
- 2953US4633474ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1984·Granted Dec 30, 1986·9 cites·2 claims
- 3052US6091536AOptical processing deviceKDD CORP·Filed 1998·Granted Jul 18, 2000·19 cites·16 claims
- 3152US5359679AOptical modulatorKOKUSAI DENSHIN DENWA CO LTD·Filed 1993·Granted Oct 25, 1994·16 cites·3 claims
- 3252US4648096ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1984·Granted Mar 3, 1987·9 cites·2 claims
- 3349US5132747AAvalanche photo diodeKOKUSAI DENSHIN DENWA CO LTD·Filed 1991·Granted Jul 21, 1992·11 cites·1 claims
- 3447US5952683AFunctional semiconductor element with avalanche multiplicationKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Sep 14, 1999·16 cites·14 claims
- 3546US4826291AMethod for manufacturing diffraction gratingKOKUSAI DENSHIN DENWA CO LTD·Filed 1986·Granted May 2, 1989·7 cites·6 claims
- 3645US4383266AAvalanche photo diodeKOKUSAI DENSHIN DENWA CO LTD·Filed 1980·Granted May 10, 1983·9 cites·3 claims
- 3744US5805327AReshaping device for optical short pulsesKOKUSAI DENSHIN DENWA CO LTD·Filed 1996·Granted Sep 8, 1998·13 cites·9 claims
- 3842US4892832AFilter bag for microbiological examinationTOPPAN PRINTING CO LTD·Filed 1987·Granted Jan 9, 1990·13 cites·8 claims
- 3941US4991921APn junction optical modulating device having a buffer layer with small energy gapKOKUSAI DENSHIN DENWA CO LTD·Filed 1989·Granted Feb 12, 1991·8 cites·5 claims
- 4040US4729004ASemiconductor photo deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1986·Granted Mar 1, 1988·6 cites·6 claims
- 4139US4506367ADistributed feedback semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1982·Granted Mar 19, 1985·4 cites·1 claims
- 4237US5663572AOptical functional semiconductor elementKOKUSAI DENSHIN DENWA CO LTD·Filed 1995·Granted Sep 2, 1997·8 cites·4 claims
- 4336US6147901ASemiconductor memory operating electrically and optically, retaining information without power supplyKDD CORP·Filed 1999·Granted Nov 14, 2000·6 cites·20 claims
- 4436US4897845ASemiconductor optical amplifying elementKOKUSAI DENSHIN DENWA CO LTD·Filed 1989·Granted Jan 30, 1990·3 cites·5 claims
- 4535US6327404B1Wavelength filterKDD CORP·Filed 1999·Granted Dec 4, 2001·5 cites·10 claims
- 4635US5912911AOptical short pulse reshaping deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1997·Granted Jun 15, 1999·6 cites·10 claims
- 4735US4589117AButt-jointed built-in semiconductor laserKOKUSAI DENSHIN DENWA CO LTD·Filed 1983·Granted May 13, 1986·3 cites·3 claims
- 4833US2002136494A1Optical deviceFiled 2002·Application pending·0 cites
- 4932US5729378AOptical deviceKOKUSAI DENSIN DENWA KABUSIKI·Filed 1996·Granted Mar 17, 1998·6 cites·16 claims
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