Inventor · disambiguated record
Keiichi Nakajima
Also filed as: NAKAJIMA KEIICHI
25 granted patents·7 pending applications·540 citations·filing 1993–2018
96Inventor score
Top patents by PatentIndex Score
32 records- 0196US6796491B2Electronic payment system, payment apparatus and terminal thereofFiled 2002·Granted Sep 28, 2004·166 cites·23 claims
- 0294US7523067B1Electronic settlement system, settlement apparatus, and terminalSOFTBANKBB CORP·Filed 2000·Granted Apr 21, 2009·140 cites·32 claims
- 0390US7296755B2Electronic payment system, payment apparatus and terminal thereofSOFTBANKBB CORP·Filed 2005·Granted Nov 20, 2007·14 cites·14 claims
- 0486US8678409B2Suspension structure and link arranging methodKOIDE REO·Filed 2012·Granted Mar 25, 2014·17 cites·7 claims
- 0585US7457782B2Electronic settlement system, settlement apparatus and terminalSOFTBANKBB CORP·Filed 2006·Granted Nov 25, 2008·10 cites·52 claims
- 0685US7430522B2Exchange rate calculatorSOFTBANKBB CORP·Filed 2007·Granted Sep 30, 2008·13 cites·10 claims
- 0784US7448540B2Electronic settlement system, settlement apparatus and terminalSOFTBANKBB CORP·Filed 2005·Granted Nov 11, 2008·8 cites·4 claims
- 0884US7014106B2Electronic payment system, payment apparatus, and terminal thereofSOFTBANKBB CORP·Filed 2004·Granted Mar 21, 2006·25 cites·12 claims
- 0980US7865401B2Electronic settlement system, settlement apparatus, and terminalSOFTBANK BB CORP·Filed 2007·Granted Jan 4, 2011·5 cites·36 claims
- 1078US5618193AStructure for connecting spark plug and ignition coil for internal combustionSUMITOMO WIRING SYSTEMS·Filed 1995·Granted Apr 8, 1997·32 cites·6 claims
- 1177US7911050B2Semiconductor device and method for manufacturing the sameRENESAS ELECTRONICS CORP·Filed 2008·Granted Mar 22, 2011·6 cites·4 claims
- 1276US8628101B2Suspension structure, bush structure and suspension characteristic adjusting methodKOIDE REO·Filed 2012·Granted Jan 14, 2014·10 cites·18 claims
- 1376US6587089B1LCD panel and LCD device equipped therewithNEC CORP·Filed 2000·Granted Jul 1, 2003·16 cites·9 claims
- 1473US7571117B1Electronic authentication system, authentication apparatus, and terminalSOFTBANKBB CORP·Filed 2000·Granted Aug 4, 2009·4 cites·45 claims
- 1567US7570714B2Data transfer apparatus for low voltage differential signalingNEC ELECTRONICS CORP·Filed 2004·Granted Aug 4, 2009·11 cites·5 claims
- 1661US8573619B2Suspension assembling structure, spring seat, and suspension assembling methodKOIDE REO·Filed 2012·Granted Nov 5, 2013·2 cites·9 claims
- 1756US11019774B2Plant cultivation deviceNATUREDYNE INC·Filed 2018·Granted Jun 1, 2021·0 cites·24 claims
- 1852US2009006144A1Ticket Use System and Ticket Use MethodNAKAJIMA KEIICHI·Filed 2006·Application pending·0 cites
- 1951US2007145156A1Wireless tagNAKAJIMA KEIICHI·Filed 2006·Application pending·0 cites
- 2049US7273183B2Wireless tagSOFTBANKBB CORP·Filed 2005·Granted Sep 25, 2007·0 cites·12 claims
- 2149USD360875SProtector for an electrical connecting partSUMITOMO WIRING SYSTEMS·Filed 1993·Granted Aug 1, 1995·6 cites·1 claims
- 2249US2017347538A1Plant cultivation deviceNATUREDYNE INC·Filed 2016·Application pending·0 cites
- 2346US2006001635A1Driver circuit and display device using the sameNEC ELECTRONICS CORP·Filed 2005·Application pending·0 cites
- 2445US2007177740A1Encryption key distribution system, key distribution server, locking terminal, viewing terminal, encryption key distribution method, and computer-readable mediumNAKAJIMA KEIICHI·Filed 2007·Application pending·0 cites
- 2544US5340323ACoil spring engagement construction of a high tension terminal in an engine ignition apparatusSUMITOMO WIRING SYSTEMS·Filed 1993·Granted Aug 23, 1994·13 cites·5 claims
- 2642US7657490B1Electronic settlement system, settlement device, and terminalSOFTBANKBB CORP·Filed 1999·Granted Feb 2, 2010·22 cites·42 claims
- 2741US5492105AIgnition system for internal combustion engineSUMITOMO WIRING SYSTEMS·Filed 1994·Granted Feb 20, 1996·9 cites·1 claims
- 2840US2018057695A1Surface treatment agent for metal material, and metal material having surface treatment coatNIHON PARKERIZING·Filed 2016·Application pending·0 cites
- 2935US9779581B2Amusement systemKONAMI DIGITAL ENTERTAINMENT CO LTD·Filed 2013·Granted Oct 3, 2017·0 cites·13 claims
- 3035US5421736AConstruction for retaining coiled spring of high-voltage terminal in engine ignition systemSUMITOMO WIRING SYSTEMS·Filed 1994·Granted Jun 6, 1995·6 cites·1 claims
- 3135US2013341881A1Suspension device for vehicle, and method for installing shock absorberKOIDE REO·Filed 2012·Application pending·0 cites
- 3233US6195549B1Digital mobile communication systemOKI ELECTRIC IND CO LTD·Filed 1998·Granted Feb 27, 2001·5 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →