Inventor · disambiguated record
Akihisa Tomita
Also filed as: TOMITA AKIHISA
17 granted patents·3 pending applications·278 citations·filing 1989–2022
94Inventor score
Files withNEC CORP13JAPAN SCIENCE & TECH AGENCY2UNIV HOKKAIDO NAT UNIV CORP2FUJIWARA MIKIO1NAT INST INF & COMM TECH1
Top patents by PatentIndex Score
20 records- 0183US11362817B2Quantum cryptographic key output apparatus, quantum cryptographic key communication system, and quantum cryptographic key output methodUNIV HOKKAIDO NAT UNIV CORP·Filed 2017·Granted Jun 14, 2022·5 cites·8 claims
- 0282US6895092B2Cryptographic key distribution method and apparatus thereofNEC CORP·Filed 2001·Granted May 17, 2005·42 cites·11 claims
- 0382US6444999B1Quantum circuitNEC CORP·Filed 2001·Granted Sep 3, 2002·42 cites·15 claims
- 0478US6678379B1Quantum key distribution method and apparatusNEC CORP·Filed 1999·Granted Jan 13, 2004·80 cites·20 claims
- 0576US6665486B2Single photon generating apparatusNEC CORP·Filed 2001·Granted Dec 16, 2003·20 cites·26 claims
- 0675US8509446B2Time-bin polarization format exchange technique for entangled optical sourceFUJIWARA MIKIO·Filed 2010·Granted Aug 13, 2013·7 cites·4 claims
- 0773US4982255AAvalanche photodiodeNEC CORP·Filed 1989·Granted Jan 1, 1991·29 cites·2 claims
- 0872US11502831B2Transmitting device, receiving device, quantum key distribution method, and quantum key distribution program for quantum key distribution systemNEC CORP·Filed 2017·Granted Nov 15, 2022·2 cites·29 claims
- 0966US11057201B2Random number sequence generation apparatus, quantum encryption transmitter, and quantum encryption communication systemUNIV HOKKAIDO NAT UNIV CORP·Filed 2017·Granted Jul 6, 2021·1 cites·8 claims
- 1063US7974540B2Communication system and communication method using the sameJAPAN SCIENCE & TECH AGENCY·Filed 2004·Granted Jul 5, 2011·9 cites·16 claims
- 1157US7583438B2Quantum circuit and quantum computerJAPAN SCIENCE & TECH AGENCY·Filed 2002·Granted Sep 1, 2009·7 cites·5 claims
- 1251US12489614B2Photon detection device, reception device, quantum key distribution system, and method for detecting quantum signalNEC CORP·Filed 2022·Granted Dec 2, 2025·0 cites·7 claims
- 1346US2024337868A1Calibration method for phase modulator, calibration method for balanced photodetector, and calibration system for phase modulatorNAT INST INF & COMM TECH·Filed 2022·Application pending·0 cites
- 1441US2003002674A1Quantum cryptography multi-node network systemNEC CORP·Filed 2002·Application pending·0 cites
- 1540US6014394ASemiconductor laserNEC CORP·Filed 1997·Granted Jan 11, 2000·9 cites·21 claims
- 1640US5351254ASemiconductor laserNEC CORP·Filed 1992·Granted Sep 27, 1994·8 cites·9 claims
- 1738US5559820AMultiple quantum well semiconductor laserNEC CORP·Filed 1995·Granted Sep 24, 1996·8 cites·7 claims
- 1837US5642372AQuantum-well type semiconductor laser device having multi-layered quantum-well layerNEC CORP·Filed 1994·Granted Jun 24, 1997·6 cites·17 claims
- 1937US2009031137A1Blind signature method and its systemNEC CORORATION·Filed 2007·Application pending·0 cites
- 2031US5859865ASemiconductor laserNEC CORP·Filed 1997·Granted Jan 12, 1999·3 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →