Inventor · disambiguated record
Seiji Tsuruta
Also filed as: TSURUTA SEIJI
27 granted patents·4 pending applications·391 citations·filing 1989–2016
97Inventor score
Files withUNISIA JECS CORP12HITACHI AUTOMOTIVE SYSTEMS LTD4HITACHI LTD4ATSUGI UNISIA CORP3NAKAMURA MAKOTO2
Top patents by PatentIndex Score
31 records- 0187US8006658B2Variable valve actuation apparatus of internal combustion engineHITACHI LTD·Filed 2009·Granted Aug 30, 2011·11 cites·19 claims
- 0286US7565887B2Valve actuation device of internal combustion engineHITACHI LTD·Filed 2006·Granted Jul 28, 2009·17 cites·19 claims
- 0385US8677965B2Valve timing control device of internal combustion engineKATO HIROYUKI·Filed 2011·Granted Mar 25, 2014·5 cites·12 claims
- 0485US5816216ADecompression brake device of automotive internal combustion engineUNISIA JECS CORP·Filed 1997·Granted Oct 6, 1998·50 cites·22 claims
- 0583US5058539AValve timing adjusting system for internal combustion engineATSUGI UNISIA CORP·Filed 1990·Granted Oct 22, 1991·42 cites·13 claims
- 0682US8544429B2Valve control apparatus for internal combustion engineNAKAMURA MAKOTO·Filed 2010·Granted Oct 1, 2013·4 cites·18 claims
- 0781US6467443B1Valve operating device of internal combustion engineUNISIA JECS CORP·Filed 2000·Granted Oct 22, 2002·22 cites·18 claims
- 0880US6032643ADecompression engine brake device of automotive internal combustion engineUNISIA JECS CORP·Filed 1998·Granted Mar 7, 2000·34 cites·14 claims
- 0977US9470118B2Valve timing control apparatus for internal combustion engine and controller for valve timing control apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Oct 18, 2016·2 cites·18 claims
- 1074US10107155B2Valve timing control apparatus of internal combustion engineHYUNDAI MOTOR CO LTD·Filed 2016·Granted Oct 23, 2018·1 cites·8 claims
- 1174US6263843B1Valve timing control device of internal combustion engineUNISIA JECS CORP·Filed 1999·Granted Jul 24, 2001·27 cites·26 claims
- 1273US5592909ACamshaft phase changing deviceUNISIA JECS CORP·Filed 1995·Granted Jan 14, 1997·27 cites·11 claims
- 1371US6691654B2Valve-lash adjuster equipped valve operating device for internal combustion engineHITACHI UNISIA AUTOMOTIVE LTD·Filed 2002·Granted Feb 17, 2004·12 cites·20 claims
- 1470US8899197B2Valve-timing control apparatus for internal combustion engineKOKUBO NAOKI·Filed 2011·Granted Dec 2, 2014·2 cites·14 claims
- 1569US6032624AEngine valve actuating devicesUNISIA JECS CORP·Filed 1998·Granted Mar 7, 2000·23 cites·7 claims
- 1669US5203290AIntake and/or exhaust-valve timing control sytem for internal combustion engineATSUGI UNISIA CORP·Filed 1992·Granted Apr 20, 1993·27 cites·6 claims
- 1765US6397806B2Engine valve assembly for internal combustion engineUNISIA JECS CORP·Filed 2001·Granted Jun 4, 2002·11 cites·16 claims
- 1865US2017002699A1Valve timing control apparatus for internal combustion engine and controller for valve timing control apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Application pending·0 cites
- 1964US9068626B2Balancer device of internal combustion engineHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2014·Granted Jun 30, 2015·2 cites·10 claims
- 2063US8061315B2Variable valve actuating apparatus for internal combustion engine and control shaft for variable valve actuating apparatusNAKAMURA MAKOTO·Filed 2009·Granted Nov 22, 2011·2 cites·21 claims
- 2157US5647319ADecompression braking apparatus for diesel engineUNISIA JECS CORP·Filed 1996·Granted Jul 15, 1997·19 cites·10 claims
- 2252US5794576AEngine cylinder valve controlling apparatusUNISIA JECS CORP·Filed 1997·Granted Aug 18, 1998·12 cites·20 claims
- 2351US5655499ADecompression braking apparatus for diesel engineUNISIA JECS CORP·Filed 1996·Granted Aug 12, 1997·15 cites·7 claims
- 2444US5749341AValve lifter for internal combustion enginesUNISIA JECS CORP·Filed 1997·Granted May 12, 1998·10 cites·10 claims
- 2543US5918367AMethod of producing valve lifterUNISIA JECS CORP·Filed 1997·Granted Jul 6, 1999·8 cites·7 claims
- 2641US2006027200A1Valve lifter and forming and processing method thereforHITACHI LTD·Filed 2005·Application pending·0 cites
- 2739US9874116B2Valve-timing control device for internal combustion engineHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted Jan 23, 2018·0 cites·13 claims
- 2838US2005284434A1Slide member and method for producing the slide memberHITACHI LTD·Filed 2005·Application pending·0 cites
- 2937US2012073534A1Valve lifter for internal combustion engineTANAKA TOMOYA·Filed 2011·Application pending·0 cites
- 3034US5205248AIntake- and/or exhaust-valve timing control system for internal combustion enginesATSUGI UNISIA CORP·Filed 1991·Granted Apr 27, 1993·5 cites·14 claims
- 3130US4945871AHydraulic valve lifter for internal combustion engineATSUGI MOTOR PARTS CO LTD·Filed 1989·Granted Aug 7, 1990·1 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →