Inventor · disambiguated record
Akio Tajima
Also filed as: TAJIMA AKIO
103 granted patents·17 pending applications·1,094 citations·filing 1986–2025
99Inventor score
Top patents by PatentIndex Score
120 records- 0195US11109123B2Optical network management apparatus and method of allocating optical frequency bandNEC CORP·Filed 2020·Granted Aug 31, 2021·3 cites·14 claims
- 0295US10375460B2Optical network management apparatus and method of allocating optical frequency bandNEC CORP·Filed 2017·Granted Aug 6, 2019·8 cites·20 claims
- 0394US11201668B2Optical network system, optical node device, and optical network control methodNEC CORP·Filed 2020·Granted Dec 14, 2021·3 cites·9 claims
- 0491US8041039B2Secret communications system and channel control methodNEC CORP·Filed 2007·Granted Oct 18, 2011·25 cites·25 claims
- 0591US7613396B2Multiplexing communication system and crosstalk elimination methodNEC CORP·Filed 2005·Granted Nov 3, 2009·21 cites·8 claims
- 0690US8273843B2Organosilicon compound and thermosetting resin composition containing the sameTAJIMA AKIO·Filed 2010·Granted Sep 25, 2012·7 cites·13 claims
- 0790US8184989B2Communication system and timing control methodMAEDA WAKAKO·Filed 2006·Granted May 22, 2012·19 cites·44 claims
- 0890US6714740B2Optical network and switch control method for use in the optical networkNEC CORP·Filed 2001·Granted Mar 30, 2004·25 cites·4 claims
- 0989US11909647B2Encryption key generationNEC CORP·Filed 2020·Granted Feb 20, 2024·2 cites·24 claims
- 1089US10750259B2Optical network management apparatus and method of allocating optical frequency bandNEC CORP·Filed 2019·Granted Aug 18, 2020·4 cites·20 claims
- 1189US5336004ADot printerSEIKOSHA KK·Filed 1993·Granted Aug 9, 1994·86 cites·47 claims
- 1288US7899183B2Random number generating and sharing system, encrypted communication apparatus, and random number generating and sharing method for use thereinNEC CORP·Filed 2005·Granted Mar 1, 2011·18 cites·42 claims
- 1388US6008482AMicrowave oven with induction steam generating apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Dec 28, 1999·89 cites·9 claims
- 1487US11652546B2Optical network system, optical node device, and optical network control methodNEC CORP·Filed 2021·Granted May 16, 2023·1 cites·4 claims
- 1587US8204231B2Method and device for managing cryptographic keys in secret communications networkMAEDA WAKAKO·Filed 2008·Granted Jun 19, 2012·16 cites·36 claims
- 1687US7907850B2Optical communication device and quantum key distribution system using the sameNEC CORP·Filed 2007·Granted Mar 15, 2011·13 cites·30 claims
- 1787US7734757B2Method and system for managing shared informationNEC CORP·Filed 2007·Granted Jun 8, 2010·16 cites·23 claims
- 1887US6957018B2Optical packet exchange system and optical switchNEC CORP·Filed 2002·Granted Oct 18, 2005·26 cites·13 claims
- 1986US11736839B2Optical network management apparatus and method of allocating optical frequency bandNEC CORP·Filed 2021·Granted Aug 22, 2023·1 cites·14 claims
- 2086US8949300B2Circuit and method for controlling quality of random numbersTANAKA AKIHIRO·Filed 2007·Granted Feb 3, 2015·14 cites·33 claims
- 2186US2025358226A1Encryption key generationNEC CORP·Filed 2025·Application pending·0 cites
- 2285US6760552B1Optical receiving circuit and optical communication deviceNEC CORP·Filed 2000·Granted Jul 6, 2004·31 cites·15 claims
- 2385US4793605APaper detector of printerSEIKOSHA KK·Filed 1986·Granted Dec 27, 1988·28 cites·6 claims
- 2484US10715249B2Optical network system, optical node device, and optical network control methodNEC CORP·Filed 2016·Granted Jul 14, 2020·3 cites·18 claims
- 2583US8833511B2Insulator for audio and method for evaluating sameMARUYAMA TERUO·Filed 2011·Granted Sep 16, 2014·8 cites·19 claims
- 2683USD322278SPrinter for a computerSEIKOSHA KK·Filed 1990·Granted Dec 10, 1991·24 cites·1 claims
- 2782US10735328B2Information communication system, information communication method and deviceNEC CORP·Filed 2015·Granted Aug 4, 2020·3 cites·7 claims
- 2882US9979468B2Optical communication system, optical node device, and optical path setting methodNEC CORP·Filed 2015·Granted May 22, 2018·4 cites·20 claims
- 2982US9112677B2Communication device and cryptographic key creation method in cryptographic key sharing systemTANAKA AKIHIRO·Filed 2012·Granted Aug 18, 2015·6 cites·15 claims
- 3081US12407613B2Encryption key generationNEC CORP·Filed 2023·Granted Sep 2, 2025·0 cites·16 claims
- 3181US8718485B2Quantum key distribution system, optical transmitter, optical modulation control circuit, and optical modulation control methodTANAKA AKIHIRO·Filed 2008·Granted May 6, 2014·8 cites·23 claims
- 3280US12289568B2Optical network management apparatus and method of allocating optical frequency bandNEC CORP·Filed 2023·Granted Apr 29, 2025·0 cites·14 claims
- 3380US8987358B2Compound including organopolysiloxane or silsesquioxane skeleton having isocyanuric skeleton, epoxy group and SiH group, thermosetting resin composition containing the compound as adhesion-imparting agent, hardened material and sealing agent for optical semiconductorKAWABATA KIICHI·Filed 2012·Granted Mar 24, 2015·5 cites·10 claims
- 3480US7783042B2Communication system and synchronization method thereofNEC CORP·Filed 2005·Granted Aug 24, 2010·9 cites·27 claims
- 3580US6570687B2Optical packet exchange system and optical switchNEC CORP·Filed 2002·Granted May 27, 2003·13 cites·6 claims
- 3679US5172899APaper feederSEIKOSHA KK·Filed 1991·Granted Dec 22, 1992·24 cites·1 claims
- 3778US12170539B2Optical network system, optical node device, and optical network control methodNEC CORP·Filed 2023·Granted Dec 17, 2024·0 cites·5 claims
- 3878US9160529B2Secret communication system and method for generating shared secret informationTAJIMA AKIO·Filed 2006·Granted Oct 13, 2015·9 cites·18 claims
- 3978US8009984B2Method and apparatus for measuring optical power of very weak light, and optical communication system using the sameNEC CORP·Filed 2006·Granted Aug 30, 2011·7 cites·28 claims
- 4078US2024405875A1Multi-layer network system and path setting method in multi-layer networkNEC CORP·Filed 2024·Application pending·0 cites
- 4177US11248009B2Polycyclic aromatic compound, material for an organic device, organic electroluminescent element, display apparatus and lighting apparatusKWANSEI GAKUIN EDUCATIONAL FOUND·Filed 2019·Granted Feb 15, 2022·1 cites·16 claims
- 4277US6760346B1Packet switching networkNEC CORP·Filed 2000·Granted Jul 6, 2004·26 cites·7 claims
- 4376US7580634B2Transmission method, transmitter-receiver, and transmitting-receiving systemNEC CORP·Filed 2004·Granted Aug 25, 2009·14 cites·65 claims
- 4475US9512273B2Thermosetting resin compositionJNC CORP·Filed 2013·Granted Dec 6, 2016·1 cites·11 claims
- 4575US8638942B2Method and system for managing shared random numbers in secret communication networkMAEDA WAKAKO·Filed 2009·Granted Jan 28, 2014·6 cites·25 claims
- 4675US6373911B1Bit synchronization circuitNEC CORP·Filed 1999·Granted Apr 16, 2002·89 cites·9 claims
- 4774US11115318B2Optical network control devices and optical path setting methodNEC CORP·Filed 2017·Granted Sep 7, 2021·2 cites·18 claims
- 4874US8041232B2Optical transmitter and control method thereofNEC CORP·Filed 2008·Granted Oct 18, 2011·5 cites·25 claims
- 4973US10211923B2Optical network system, optical node device, and optical path setting methodNEC CORP·Filed 2015·Granted Feb 19, 2019·2 cites·14 claims
- 5073US8171354B2Communication system and method for controlling the sameTANAKA AKIHIRO·Filed 2011·Granted May 1, 2012·3 cites·36 claims
Showing the top 50 of 120 patent records by PatentIndex Score.
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