Assignee
FUJI VALVE
JP·70 granted patents·4 pending applications·736 citations·filing 1989–2021
Top patents by PatentIndex Score
74 records- 0192US5983847AElectric valve drive device in an internal combustion engineFUJI VALVE·Filed 1999·Granted Nov 16, 1999·65 cites·33 claims
- 0292US5427141APressure fluid control valve deviceFUJI VALVE·Filed 1994·Granted Jun 27, 1995·73 cites·2 claims
- 0384US6382246B2Valve position detectorFUJI VALVE·Filed 2001·Granted May 7, 2002·26 cites·3 claims
- 0484US6354001B1Method of manufacturing a Ti alloy poppet valueFUJI VALVE·Filed 2000·Granted Mar 12, 2002·17 cites·8 claims
- 0582US5485815APoppet valve deviceFUJI VALVE·Filed 1995·Granted Jan 23, 1996·41 cites·7 claims
- 0681US5370364ATitanium alloy engine valve shaft structureFUJI VALVE·Filed 1994·Granted Dec 6, 1994·32 cites·8 claims
- 0772US6691910B2Method of joining different metal materials by friction weldingFUJI VALVE·Filed 2002·Granted Feb 17, 2004·12 cites·9 claims
- 0872US5431136AInternal combustion valve having an iron based hard-facing alloy contact surfaceFUJI VALVE·Filed 1994·Granted Jul 11, 1995·21 cites·2 claims
- 0970US5769037AHollow valve in an internal combustion engineFUJI VALVE·Filed 1997·Granted Jun 23, 1998·30 cites·7 claims
- 1068US4887566AHydraulic valve lash adjusterFUJI VALVE·Filed 1989·Granted Dec 19, 1989·21 cites·4 claims
- 1165US4920935AHydraulic valve lash adjusterFUJI VALVE·Filed 1989·Granted May 1, 1990·19 cites·3 claims
- 1263US5799683APoppet valve and method of manufacturing itFUJI VALVE·Filed 1996·Granted Sep 1, 1998·19 cites·6 claims
- 1363US5455078AMethod of roughening and coating the contact surface of a valve lifterFUJI VALVE·Filed 1993·Granted Oct 3, 1995·23 cites·3 claims
- 1462US6619251B2Tappet for an internal combustion engineFUJI VALVE·Filed 2002·Granted Sep 16, 2003·8 cites·2 claims
- 1562US6341588B2Valve spring retainer and a valve operating mechanismFUJI VALVE·Filed 2001·Granted Jan 29, 2002·7 cites·3 claims
- 1662US6295731B1Method of hardening a valve face of a poppet valveFUJI VALVE·Filed 2000·Granted Oct 2, 2001·11 cites·7 claims
- 1762US5988123AMethod of controlling an electric valve drive device and a control system thereforFUJI VALVE·Filed 1998·Granted Nov 23, 1999·18 cites·9 claims
- 1862US5740769AMethod of adjusting a valve clearanceFUJI VALVE·Filed 1997·Granted Apr 21, 1998·17 cites·7 claims
- 1958US6592683B2Ti alloy surface treatmentFUJI VALVE·Filed 2001·Granted Jul 15, 2003·3 cites·11 claims
- 2058US2014352385A1Apparatus for producing a hollow poppet valveFUJI VALVE·Filed 2014·Application pending·0 cites
- 2157US5662078AIntake valve device for preventing adhesion of depositsFUJI VALVE·Filed 1996·Granted Sep 2, 1997·17 cites·8 claims
- 2256US5611306AInternal combustion engine valveFUJI VALVE·Filed 1995·Granted Mar 18, 1997·17 cites·7 claims
- 2354US6131603ATi alloy poppet valve and surface treatment thereofFUJI VALVE·Filed 1999·Granted Oct 17, 2000·19 cites·15 claims
- 2453US11982212B2Hollow engine valve and production method thereofFUJI VALVE·Filed 2021·Granted May 14, 2024·0 cites·9 claims
- 2553US6623568B2Ti alloy poppet valve and a method of manufacturing the sameFUJI VALVE·Filed 2002·Granted Sep 23, 2003·1 cites·8 claims
- 2652US6338325B1Valve operating mechanism of an internal combustion engineFUJI VALVE·Filed 2000·Granted Jan 15, 2002·4 cites·1 claims
- 2750US6209197B1Method of manufacturing tappet in an internal combustion engineFUJI VALVE·Filed 2000·Granted Apr 3, 2001·4 cites·17 claims
- 2849US6311661B1Valve spring retainer and a valve operating mechanismFUJI VALVE·Filed 2001·Granted Nov 6, 2001·4 cites·2 claims
- 2948US5543029AProperties of the surface of a titanium alloy engine valveFUJI VALVE·Filed 1995·Granted Aug 6, 1996·11 cites·3 claims
- 3046US5787596AApparatus for simultaneously measuring thickness of bottom wall and inside diameter of bottoming holeFUJI VALVE·Filed 1997·Granted Aug 4, 1998·12 cites·4 claims
- 3145US6511045B2Ti alloy poppet valve and a method of manufacturing the sameFUJI VALVE·Filed 2001·Granted Jan 28, 2003·2 cites·6 claims
- 3244US6073345AMethod of manufacturing a tappetFUJI VALVE·Filed 1998·Granted Jun 13, 2000·7 cites·6 claims
- 3344US5674111AMethod of processing a workpieceFUJI VALVE·Filed 1995·Granted Oct 7, 1997·13 cites·1 claims
- 3444US5551908ACenterless grinder and wheel truing device thereforFUJI VALVE·Filed 1995·Granted Sep 3, 1996·16 cites·8 claims
- 3543US6293240B1Valve spring retainer and a valve operating mechanismFUJI VALVE·Filed 2000·Granted Sep 25, 2001·2 cites·3 claims
- 3643US5675969AExhaust gas control device in an internal combustion engineFUJI VALVE·Filed 1996·Granted Oct 14, 1997·12 cites·5 claims
- 3743US5537744ATappet for an IC engineFUJI VALVE·Filed 1995·Granted Jul 23, 1996·8 cites·3 claims
- 3841US5899185AMethod of increasing heat transfer of a fitted material of a cylinder head in an internal combustion engine and a fitted portion of the fitted materialFUJI VALVE·Filed 1997·Granted May 4, 1999·8 cites·19 claims
- 3941US5570663AValve rotatorFUJI VALVE·Filed 1995·Granted Nov 5, 1996·8 cites·5 claims
- 4041US4986166AHydraulic valve lash adjusterFUJI VALVE·Filed 1989·Granted Jan 22, 1991·8 cites·2 claims
- 4140US6073912AAl or Al alloy poppet valve and a method of manufacturing the sameFUJI VALVE·Filed 1998·Granted Jun 13, 2000·7 cites·6 claims
- 4240US5901728AAluminum alloy valve spring retainer and method of making sameFUJI VALVE·Filed 1997·Granted May 11, 1999·6 cites·6 claims
- 4340US5884596AValve spring in an internal combustion engineFUJI VALVE·Filed 1998·Granted Mar 23, 1999·5 cites·1 claims
- 4440US5239953AHydraulic tappet for an internal combustion engineFUJI VALVE·Filed 1993·Granted Aug 31, 1993·9 cites·12 claims
- 4540US2003041922A1Method of strengthening Ti alloyFUJI VALVE·Filed 2002·Application pending·0 cites
- 4639US5970613AMethod of manufacturing a wear resistant cylinderFUJI VALVE·Filed 1998·Granted Oct 26, 1999·5 cites·27 claims
- 4739US5616192ACoil retainer for engine valve and preparation of the sameFUJI VALVE·Filed 1995·Granted Apr 1, 1997·6 cites·4 claims
- 4838US5289804ATappet in an internal combustion engineFUJI VALVE·Filed 1993·Granted Mar 1, 1994·7 cites·4 claims
- 4937US5269268ATappet in an internal combustion engine and method of manufacturing the sameFUJI VALVE·Filed 1993·Granted Dec 14, 1993·6 cites·1 claims
- 5036US9757826B2Method of charging a hollow valve with metallic sodiumFUJI VALVE·Filed 2014·Granted Sep 12, 2017·0 cites·5 claims
Showing the top 50 of 74 patent records by PatentIndex Score.
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