Inventor · disambiguated record
Ryoichi Nakase
Also filed as: NAKASE RYOICHI
62 granted patents·1 pending application·1,262 citations·filing 1983–2006
99Inventor score
Top patents by PatentIndex Score
63 records- 0196US5031562AMarine steering apparatusSANSHIN KOGYO KK·Filed 1987·Granted Jul 16, 1991·55 cites·15 claims
- 0294US4565528ATilting mechanism for marine propulsion deviceSANSHIN KOGYO KK·Filed 1984·Granted Jan 21, 1986·43 cites·22 claims
- 0393US5558549AFour cycle engine for watercraftSANSHIN KOGYO KK·Filed 1995·Granted Sep 24, 1996·66 cites·33 claims
- 0493US5154650AWater jet propulsion unitSANSHIN KOGYO KK·Filed 1990·Granted Oct 13, 1992·40 cites·13 claims
- 0589US4971584AWater jet propelling vesselSANSHIN KOGYO KK·Filed 1989·Granted Nov 20, 1990·32 cites·9 claims
- 0688US5902158ASmall watercraftYAMAHA MOTOR CO LTD·Filed 1996·Granted May 11, 1999·40 cites·44 claims
- 0787US4997399AExhaust system for small vesselSANSHIN KOGYO KK·Filed 1989·Granted Mar 5, 1991·58 cites·12 claims
- 0883US5782214AExhaust timing control for a planing-type boatSANSHIN KOGYO KK·Filed 1996·Granted Jul 21, 1998·31 cites·8 claims
- 0983US5049099APower tilt deviceSANSHIN KOGYO KK·Filed 1990·Granted Sep 17, 1991·22 cites·6 claims
- 1083US4850908ADrawing away device of bilge water for water jet propulsionSANSHIN KOGYO KK·Filed 1988·Granted Jul 25, 1989·29 cites·8 claims
- 1183US4583953AOutboard motorYAMAHA MOTOR CO LTD·Filed 1985·Granted Apr 22, 1986·24 cites·13 claims
- 1280US5788547AExhaust pipe cooling system for watercraftYAMAHA MOTOR CO LTD·Filed 1996·Granted Aug 4, 1998·34 cites·27 claims
- 1380US5524597AIgnition system for watercraftSANSHIN KOGYO KK·Filed 1994·Granted Jun 11, 1996·22 cites·22 claims
- 1479US5558456ADrive bearing arrangements for watercraftSANSHIN KOGYO KK·Filed 1994·Granted Sep 24, 1996·27 cites·10 claims
- 1579US5531620AWater-cooled exhaust system for watercraftSANSHIN KOGYO KK·Filed 1994·Granted Jul 2, 1996·27 cites·25 claims
- 1677US4989409AExhaust device for small sized boat engineSANSHIN KOGYO KK·Filed 1989·Granted Feb 5, 1991·39 cites·8 claims
- 1777US4813898AWater jet propulsionSANSHIN KOGYO KK·Filed 1987·Granted Mar 21, 1989·20 cites·21 claims
- 1876US6015321AFuel pump mounting arrangement for personal watercraftYAMAHA MOTOR CO LTD·Filed 1997·Granted Jan 18, 2000·27 cites·10 claims
- 1976US5067448AExhaust cooling device for small sized boat engineSANSHIN KOGYO KK·Filed 1989·Granted Nov 26, 1991·37 cites·4 claims
- 2075US4765075AWater propulsion unit of water jet propulsion craftSANSHIN KOGYO KK·Filed 1986·Granted Aug 23, 1988·19 cites·7 claims
- 2174US5634832AInduction system for four-cycle watercraft engineSANSHIN KOGYO KK·Filed 1995·Granted Jun 3, 1997·25 cites·21 claims
- 2274US5372526ADrive bearing lubricating device for water injection propulsion vesselSANSHIN KOGYO KK·Filed 1993·Granted Dec 13, 1994·18 cites·5 claims
- 2373US6024068AWatercraft engine controlYAMAHA MOTOR CO LTD·Filed 1998·Granted Feb 15, 2000·27 cites·7 claims
- 2471US5906524AThrottle position sensor mounting arrangement for personal watercraft engineYAMAHA MOTOR CO LTD·Filed 1997·Granted May 25, 1999·19 cites·10 claims
- 2571US5562509AWatercraft catalytic exhaust systemSANSHIN KOGYO KK·Filed 1995·Granted Oct 8, 1996·24 cites·13 claims
- 2671US5366397AWater jet propulsion unitSANSHIN KOGYO KK·Filed 1993·Granted Nov 22, 1994·17 cites·12 claims
- 2771US4773883AMotor for watercraftsSANSHIN KOGYO KK·Filed 1986·Granted Sep 27, 1988·22 cites·21 claims
- 2870US5251439AExhaust device for small sized boat engineSANSHIN KOGYO KK·Filed 1992·Granted Oct 12, 1993·25 cites·12 claims
- 2967US6120335ACatalytic exhaust system for watercraftYAMAHA MOTOR CO LTD·Filed 1999·Granted Sep 19, 2000·29 cites·28 claims
- 3067US5902161AAir temperature sensor arrangement for a small watercraftYAMAHA MOTOR CO LTD·Filed 1998·Granted May 11, 1999·23 cites·19 claims
- 3166US6095876AEngine component layoutYAMAHA MOTOR CO LTD·Filed 1998·Granted Aug 1, 2000·14 cites·30 claims
- 3266US6010378AWatercraft catalytic exhaust systemSANSHIN KOGYO KK·Filed 1997·Granted Jan 4, 2000·21 cites·34 claims
- 3366US4702714ATilt mechanism for marine propulsion deviceSANSHIN KOGYO KK·Filed 1985·Granted Oct 27, 1987·14 cites·9 claims
- 3465US7118431B2Watercraft steering assist systemYAMAHA MOTOR CO LTD·Filed 2003·Granted Oct 10, 2006·8 cites·29 claims
- 3565US5967861AThrottle position sensor mounting arrangement for personal watercraft engineYAMAHA MOTOR CO LTD·Filed 1997·Granted Oct 19, 1999·17 cites·8 claims
- 3661US4744322ARemote steering system for marine propulsion craftsSANSHIN KOGYO KK·Filed 1986·Granted May 17, 1988·12 cites·6 claims
- 3760US6425789B2Small watercraftYAMAHA MOTOR CO LTD·Filed 2000·Granted Jul 30, 2002·6 cites·55 claims
- 3859US4811560AExhaust system for marine propulsionSANSHIN KOGYO KK·Filed 1987·Granted Mar 14, 1989·23 cites·29 claims
- 3957US6565399B2Watercraft catalytic exhaust systemSANSHIN KOGYO KK·Filed 2002·Granted May 20, 2003·5 cites·45 claims
- 4057US5797775AEngine control system for a watercraftYAMAHA MOTOR CO LTD·Filed 1996·Granted Aug 25, 1998·26 cites·30 claims
- 4154US6371819B1Throttle position sensor mounting arrangement for personal watercraft engineYAMAHA MOTOR CO LTD·Filed 1999·Granted Apr 16, 2002·11 cites·36 claims
- 4253US7381106B2Watercraft steering assist systemYAMAHA MOTOR CO LTD·Filed 2006·Granted Jun 3, 2008·1 cites·13 claims
- 4353US5787847AOil supply system for a planing type boatYAMAHA MOTOR CO LTD·Filed 1996·Granted Aug 4, 1998·15 cites·19 claims
- 4453US5702276AWatercraft catalytic exhaust systemSANSHIN KOGYO KK·Filed 1996·Granted Dec 30, 1997·19 cites·24 claims
- 4552US6022253AInjection system for small watercraftYAMAHA MOTOR CO LTD·Filed 1998·Granted Feb 8, 2000·17 cites·14 claims
- 4651US6279546B1Watercraft fuel supply systemYAMAHA MOTOR CO LTD·Filed 1996·Granted Aug 28, 2001·11 cites·40 claims
- 4749US5632660AWatercraft catalytic exhaust systemSANSHIN KOGYO KK·Filed 1995·Granted May 27, 1997·9 cites·21 claims
- 4848US6210243B1Fuel pump arrangement for watercraftYAMAHA MOTOR CO LTD·Filed 1998·Granted Apr 3, 2001·10 cites·48 claims
- 4946US5951342AOil supply system for personal watercraftYAMAHA MOTOR CO LTD·Filed 1997·Granted Sep 14, 1999·14 cites·13 claims
- 5045US6200178B1Small watercraftYAMAHA MOTOR CO LTD·Filed 1999·Granted Mar 13, 2001·7 cites·43 claims
Showing the top 50 of 63 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →