Inventor · disambiguated record
Akihiko Yamagata
Also filed as: YAMAGATA AKIHIKO
20 granted patents·2 pending applications·127 citations·filing 2002–2022
94Inventor score
Top patents by PatentIndex Score
22 records- 0182US8180925B2Service providing method and integrated circuitYAMAGATA AKIHIKO·Filed 2010·Granted May 15, 2012·5 cites·9 claims
- 0281US7802018B2Service providing method and integrated circuitSONY CORP·Filed 2008·Granted Sep 21, 2010·6 cites·13 claims
- 0380US7742604B2Integrated circuit device, information processing apparatus, memory management method for information storage device, mobile terminal apparatus, semiconductor integrated circuit device, and communication method using mobile terminal apparatusSONY CORP·Filed 2009·Granted Jun 22, 2010·7 cites·8 claims
- 0478US8788717B2Circuit device and a communication apparatusYAMAGATA AKIHIKO·Filed 2012·Granted Jul 22, 2014·3 cites·19 claims
- 0578US7240846B2IC chip and information processing terminalSONY CORP·Filed 2002·Granted Jul 10, 2007·19 cites·11 claims
- 0675US9628936B2Circuit device and a communication apparatusSONY CORP·Filed 2014·Granted Apr 18, 2017·2 cites·27 claims
- 0775US7519655B2Service providing method and integrated circuitSONY CORP·Filed 2002·Granted Apr 14, 2009·6 cites·38 claims
- 0872US7508946B2Integrated circuit device, information processing apparatus, memory management method for information storage device, mobile terminal apparatus, semiconductor integrated circuit device, and communication method using mobile terminal apparatusSONY CORP·Filed 2002·Granted Mar 24, 2009·13 cites·24 claims
- 0967US10609507B2Circuit device and a communication apparatusSONY CORP·Filed 2017·Granted Mar 31, 2020·0 cites·19 claims
- 1066US6932269B2Pass-code identification device and pass-code identification methodSONY CORP·Filed 2002·Granted Aug 23, 2005·17 cites·11 claims
- 1165USRE48950EIC chip and information processing terminalSONY GROUP CORP·Filed 2019·Granted Mar 1, 2022·0 cites·17 claims
- 1265US7188777B2IC card, information processing terminal, trilateral data communication system, and methodSONY CORP·Filed 2002·Granted Mar 13, 2007·12 cites·23 claims
- 1363US10929565B2Integrated circuit device, information processing apparatus, memory management method for information storage device, mobile terminal apparatus, semiconductor integrated circuit device, and communication method using mobile terminal apparatusSONY CORP·Filed 2016·Granted Feb 23, 2021·0 cites·12 claims
- 1463US7554383B2Chip for non-contact reader/writer having power-supply management functionSONY CORP·Filed 2002·Granted Jun 30, 2009·15 cites·6 claims
- 1562US7004399B2Reader/writer device and automatic ticket gate including the same for checking ticketSONY CORP·Filed 2003·Granted Feb 28, 2006·14 cites·10 claims
- 1660US7821322B2Chip for non-contact reader/writer having power-supply management functionSONY CORP·Filed 2009·Granted Oct 26, 2010·3 cites·12 claims
- 1752US7092682B2Electronic circuit, modulation method, information processing device, and information processing methodSONY CORP·Filed 2003·Granted Aug 15, 2006·3 cites·16 claims
- 1851USRE45205EIC chip and information processing terminalARISAWA SHIGERU·Filed 2002·Granted Oct 28, 2014·2 cites·21 claims
- 1949US9384618B2Integrated circuit device, information processing apparatus, memory management method for information storage device, mobile terminal apparatus, semiconductor integrated circuit device, and communication method using mobile terminal apparatusYAMAGATA AKIHIKO·Filed 2010·Granted Jul 5, 2016·0 cites·27 claims
- 2047US2025211415A1Communication device, communication method, communication program, and communication systemKSKB CO LTD·Filed 2022·Application pending·0 cites
- 2144USRE47480EIC chip and information processing terminalSONY CORP·Filed 2002·Granted Jul 2, 2019·0 cites·24 claims
- 2230US2019363816A1Device and systemQUADRAC CO LTD·Filed 2017·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →