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.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →