Inventor · disambiguated record
Hiroto Kawakami
Also filed as: KAWAKAMI HIROTO
19 granted patents·3 pending applications·226 citations·filing 1992–2024
93Inventor score
Top patents by PatentIndex Score
22 records- 0190US11159242B2Optical transmitterNIPPON TELEGRAPH & TELEPHONE·Filed 2017·Granted Oct 26, 2021·9 cites·18 claims
- 0290US9020361B2Optical signal transmitter, and bias voltage control methodKAWAKAMI HIROTO·Filed 2010·Granted Apr 28, 2015·19 cites·12 claims
- 0389US11397363B2Automatic bias control circuitNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Jul 26, 2022·9 cites·20 claims
- 0489US9116368B2Optical modulation device and bias voltage control methodKAWAKAMI HIROTO·Filed 2012·Granted Aug 25, 2015·14 cites·12 claims
- 0588US10823989B2Bias control circuit and bias control methodNIPPON TELEGRAPH & TELEPHONE·Filed 2018·Granted Nov 3, 2020·4 cites·22 claims
- 0687US6263139B1Optical transmission system with group velocity dispersion compensationNIPPON TELEGRAPH & TELEPHONE·Filed 1999·Granted Jul 17, 2001·90 cites·22 claims
- 0785US10313015B2Optical transmitter and bias voltage control methodNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Jun 4, 2019·6 cites·11 claims
- 0884US10090921B2Light modulation device and light modulation methodNIPPON TELEGRAPH & TELEPHONE·Filed 2015·Granted Oct 2, 2018·7 cites·12 claims
- 0981US5265136ASodium cooled fast reactorTOSHIBA KK·Filed 1992·Granted Nov 23, 1993·50 cites·11 claims
- 1077US10536238B2Optical transmission system, optical transmission apparatus, and optical reception apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2017·Granted Jan 14, 2020·3 cites·9 claims
- 1175US7995930B2Optical receiver using Mach-Zehnder interferometerNTT ELECTRONICS CORP·Filed 2006·Granted Aug 9, 2011·8 cites·13 claims
- 1275US2025158345A1Pump light generation apparatus, optical amplifier and pump light generation methodNIPPON TELEGRAPH & TELEPHONE·Filed 2022·Application pending·0 cites
- 1373US10243664B2Optical modulator driver circuit and optical transmitterNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Mar 26, 2019·5 cites·13 claims
- 1467US2024258760A1Distributed Optical Amplifier, Distributed Optical Amplifier System, And Distributed Optical Amplification MethodNIPPON TELEGRAPH & TELEPHONE·Filed 2024·Application pending·0 cites
- 1554US12372721B2Depolarizer and optical amplifier excitation apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Jul 29, 2025·0 cites·1 claims
- 1652US11822161B2Bias voltage adjustment apparatus and IQ optical modulation systemNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Nov 21, 2023·0 cites·7 claims
- 1751US11711198B2Synchronous detection apparatus, synchronous detection method, and programNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Jul 25, 2023·0 cites·9 claims
- 1850US7379236B2Optical fiber communication system using remote pumpingNIPPON TELEGRAPH & TELEPHONE·Filed 2004·Granted May 27, 2008·2 cites·3 claims
- 1949US11194219B2Optical modulatorNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Dec 7, 2021·0 cites·6 claims
- 2049US2025028217A1Control circuit and optical circuit control methodNIPPON TELEGRAPH & TELEPHONE·Filed 2022·Application pending·0 cites
- 2148US12170542B2Optical transmitterNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Dec 17, 2024·0 cites·3 claims
- 2242US11646800B2Optical transmitter and method for controller optical transmitterNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted May 9, 2023·0 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →