Inventor · disambiguated record
Shigeki Umezawa
Also filed as: UMEZAWA SHIGEKI
24 granted patents·4 pending applications·588 citations·filing 1983–2005
97Inventor score
Top patents by PatentIndex Score
28 records- 0196US6062367AFriction plateNSK WARNER KK·Filed 1998·Granted May 16, 2000·82 cites·8 claims
- 0294US4582172AMethod and apparatus for automatically giving and receiving orders and for making calculation thereof in restaurants and shopsSAN ATOMU KK·Filed 1983·Granted Apr 15, 1986·140 cites·3 claims
- 0393US5439087AWet-type multi-plate frictional engagement apparatusNSK WARNER KK·Filed 1993·Granted Aug 8, 1995·53 cites·8 claims
- 0489US6283265B1Wet type multiplate clutchNSK WARNER KK·Filed 1999·Granted Sep 4, 2001·42 cites·22 claims
- 0585US5248016ALock-up clutch for a torque converterNSK WARNER KK·Filed 1992·Granted Sep 28, 1993·35 cites·6 claims
- 0682US5395864AWet frictional material containing activated carbon fiberNSK WANER KABUSHIKI KAISHA·Filed 1993·Granted Mar 7, 1995·33 cites·4 claims
- 0781US5452784AFrictional engagement apparatusNSK WANER KABUSHIKI KAISHA·Filed 1993·Granted Sep 26, 1995·33 cites·4 claims
- 0872US5730259AMethod of producing wet frictional plateNSK WARNER KK·Filed 1996·Granted Mar 24, 1998·22 cites·25 claims
- 0970US7322453B2Lockup clutch assemblyNSK WARNER KK·Filed 2005·Granted Jan 29, 2008·5 cites·4 claims
- 1067US7392891B2Friction plate for wet-type multiplate clutchNSK WARNER KK·Filed 2005·Granted Jul 1, 2008·3 cites·12 claims
- 1166US6060536AMethod of producing wet friction material and wet frictional materialNSK WARNER KK·Filed 1997·Granted May 9, 2000·24 cites·7 claims
- 1259US5865283ATorque converter with a lock-up mechanismNSK WARNER KK·Filed 1996·Granted Feb 2, 1999·16 cites·5 claims
- 1359US5135082ABrake bandNSK WARNER KK·Filed 1990·Granted Aug 4, 1992·15 cites·14 claims
- 1458US5647466AWet multidisk friction clutch and fabrication process thereofNSK WARNER KK·Filed 1995·Granted Jul 15, 1997·14 cites·20 claims
- 1558US5563196AWet frictional materialNSK WARNER KK·Filed 1994·Granted Oct 8, 1996·14 cites·7 claims
- 1649US6331358B1Wet friction material and process for producing the sameNSK WARNER KK·Filed 1999·Granted Dec 18, 2001·12 cites·10 claims
- 1747US5890572ALockup clutch for torque converterNSK WARNER KK·Filed 1996·Granted Apr 6, 1999·10 cites·17 claims
- 1846US6780283B2Wet friction material and manufacturing method thereforNSK WARNER KK·Filed 2002·Granted Aug 24, 2004·2 cites·26 claims
- 1945US6544632B2Wet friction material and manufacturing method thereforNSK WARNER KK·Filed 1995·Granted Apr 8, 2003·8 cites·32 claims
- 2044US6758311B2Band braking device, and method of manufacturing annular brake bandNSK WARNER KK·Filed 2003·Granted Jul 6, 2004·0 cites·2 claims
- 2142US6130177AWet friction materialNSK WARNER KK·Filed 1998·Granted Oct 10, 2000·8 cites·7 claims
- 2242US2006131125A1Wet type friction plateNSK WARNER KK·Filed 2005·Application pending·0 cites
- 2342US2006090980A1Wet type friction plate and method of producing the wet type friction plateNSK WARNER KK·Filed 2005·Application pending·0 cites
- 2441US2001008196A1Band braking device, and method of manufacturing annular brake bandFiled 2001·Application pending·0 cites
- 2540US2006151274A1Lock-up clutch deviceNSK WARNER KK·Filed 2005·Application pending·0 cites
- 2639US5467849ABrake bandNSK WARNER KK·Filed 1994·Granted Nov 21, 1995·6 cites·14 claims
- 2738US5975253ALining for brake bandNSK WARNER KK·Filed 1993·Granted Nov 2, 1999·6 cites·10 claims
- 2838US5582274ABrake bandNSK WARNER KK·Filed 1995·Granted Dec 10, 1996·5 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →