Inventor · disambiguated record
Masamichi Fujiwara
Also filed as: FUJIWARA MASAMICHI
40 granted patents·1 pending application·217 citations·filing 1997–2024
97Inventor score
Files withNIPPON TELEGRAPH & TELEPHONE28KIOXIA CORP5TOSHIBA MEMORY CORP4NTT INC2YAMAHA MOTOR CO LTD2
Top patents by PatentIndex Score
41 records- 0197US12165712B2Memory systemKIOXIA CORP·Filed 2023·Granted Dec 10, 2024·1 cites·11 claims
- 0294US7106970B2Polarization scrambler and optical network using the sameNIPPON TELEGRAPH & TELEPHONE·Filed 2005·Granted Sep 12, 2006·19 cites·7 claims
- 0392US2025054553A1Memory systemKIOXIA CORP·Filed 2024·Application pending·0 cites
- 0490US7474460B2Optical modulation apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2007·Granted Jan 6, 2009·17 cites·9 claims
- 0589US5797778AMounting arrangement for marine propulsion engineYAMAHA MOTOR CO LTD·Filed 1997·Granted Aug 25, 1998·34 cites·19 claims
- 0688US6359724B1Light generation method and light sourceNIPPON TELEGRAPH & TELEPHONE·Filed 2000·Granted Mar 19, 2002·29 cites·46 claims
- 0787US9306670B2Optical coupling/splitting device, two-way optical propagation device, and optical-transmit-receive systemNIPPON TELEGRAPH & TELEPHONE·Filed 2012·Granted Apr 5, 2016·9 cites·15 claims
- 0887US6959152B2Polarization scrambler and optical network using the sameNIPPON TELEGRAPH & TELEPHONE·Filed 2003·Granted Oct 25, 2005·30 cites·42 claims
- 0984US7127168B2Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitterNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Oct 24, 2006·31 cites·32 claims
- 1081US11539437B2Signal processing apparatus and optical receiving apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Dec 27, 2022·4 cites·14 claims
- 1180US7031614B2Polarization scrambler and optical network using the sameNIPPON TELEGRAPH & TELEPHONE·Filed 2005·Granted Apr 18, 2006·7 cites·5 claims
- 1277US11892907B2Memory systemKIOXIA CORP·Filed 2022·Granted Feb 6, 2024·0 cites·20 claims
- 1376US10430275B2Memory systemTOSHIBA MEMORY CORP·Filed 2018·Granted Oct 1, 2019·2 cites·20 claims
- 1474US11652554B2Optical receiving apparatus, optical transmission system, optical transmission method and computer programNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted May 16, 2023·2 cites·7 claims
- 1573US11763893B2Memory systemKIOXIA CORP·Filed 2022·Granted Sep 19, 2023·0 cites·11 claims
- 1673US7068412B2Multi-wavelength generating method and apparatus based on flattening of optical spectrumNIPPON TELEGRAPH & TELEPHONE·Filed 2004·Granted Jun 27, 2006·9 cites·52 claims
- 1773US6924924B2Multi-wavelength generating method and apparatus based on flattening of optical spectrumNIPPON TELEGRAPH & TELEPHONE·Filed 2003·Granted Aug 2, 2005·9 cites·7 claims
- 1871US10956264B2Memory systemTOSHIBA MEMORY CORP·Filed 2019·Granted Mar 23, 2021·1 cites·20 claims
- 1970US11222703B2Memory systemTOSHIBA MEMORY CORP·Filed 2020·Granted Jan 11, 2022·0 cites·16 claims
- 2068US11537465B2Memory systemKIOXIA CORP·Filed 2021·Granted Dec 27, 2022·0 cites·20 claims
- 2168US6831774B2Multi-wavelength generating method and apparatus based on flattening of optical spectrumNIPPON TELEGRAPH & TELEPHONE·Filed 2001·Granted Dec 14, 2004·8 cites·120 claims
- 2261US7206510B2Ring network using multi-wavelength generatorNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Apr 17, 2007·5 cites·53 claims
- 2355US10910067B2Memory systemTOSHIBA MEMORY CORP·Filed 2019·Granted Feb 2, 2021·0 cites·11 claims
- 2454US12166532B2Optical receiver and optical receiving methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Dec 10, 2024·0 cites·8 claims
- 2554US11863211B2Optical communication system and optical communication methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Jan 2, 2024·0 cites·7 claims
- 2653US12206461B2Optical feeding systemNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Jan 21, 2025·0 cites·6 claims
- 2753US12143157B2Branch ratio setting system, method for producing optical communication system and optical branch deviceNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Nov 12, 2024·0 cites·5 claims
- 2852US12283993B2Branch ratio calculation method, branch ratio calculation device and computer programNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Apr 22, 2025·0 cites·5 claims
- 2951US12368508B2Optical access system, optical transmitter, optical receiver, optical transmission method and demodulation methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Jul 22, 2025·0 cites·5 claims
- 3049US12445197B2Optical transmitter, optical access system, and optical transmission methodNTT INC·Filed 2020·Granted Oct 14, 2025·0 cites·8 claims
- 3149US11870497B2Optical receiving apparatus, optical transmission system, optical transmission method and computer programNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Jan 9, 2024·0 cites·11 claims
- 3248US12273147B2Coherent optical reception device and coherent optical reception methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Apr 8, 2025·0 cites·8 claims
- 3348US12199664B2Light leakage confirmation method, light leakage confirmation apparatus and programNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Jan 14, 2025·0 cites·13 claims
- 3446US12119869B2Optical amplification estimation method, optical amplification estimation apparatus and computer programNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Oct 15, 2024·0 cites·7 claims
- 3546US11595132B2Signal processing apparatus and optical receiverNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Feb 28, 2023·0 cites·15 claims
- 3646US11451305B2Optical receiving apparatus, optical transmitting apparatus, and frequency offset estimation methodNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Sep 20, 2022·0 cites·7 claims
- 3746US11008084B2Hybrid type vessel propulsion apparatusYAMAHA MOTOR CO LTD·Filed 2019·Granted May 18, 2021·0 cites·7 claims
- 3846US7336414B2Optical modulating deviceNIPPON TELEGRAPH & TELEPHONE·Filed 2004·Granted Feb 26, 2008·0 cites·14 claims
- 3945US12445205B2Coherent optical reception device and coherent optical reception methodNTT INC·Filed 2020·Granted Oct 14, 2025·0 cites·7 claims
- 4044US11956098B2Communication apparatus and communication methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Apr 9, 2024·0 cites·3 claims
- 4144US11621778B2Optical communication system and optical communication methodNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Apr 4, 2023·0 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →