Inventor · disambiguated record
Nobuhiko Koyama
Also filed as: KOYAMA NOBUHIKO
23 granted patents·2 pending applications·952 citations·filing 1988–2007
97Inventor score
Top patents by PatentIndex Score
25 records- 0198US6971375B2Fuel vapor treatment system for internal combustion engineNIPPON SOKEN·Filed 2005·Granted Dec 6, 2005·78 cites·19 claims
- 0297US5564398ASimplified canister for prevention of atmospheric diffusion of fuel vapor from a vehicleNIPPON DENSO CO·Filed 1994·Granted Oct 15, 1996·118 cites·12 claims
- 0396US4919103ADevice for controlling evaporative emission from a fuel tankNIPPON DENSO CO·Filed 1988·Granted Apr 24, 1990·163 cites·12 claims
- 0495US6604407B2Leak check apparatus for fuel vapor purge systemDENSO CORP·Filed 2002·Granted Aug 12, 2003·47 cites·6 claims
- 0595US4951643AFuel vapor treatment apparatusNIPPON DENSO CO·Filed 1988·Granted Aug 28, 1990·69 cites·9 claims
- 0694US7272485B2Fuel nature measuring device of internal combustion engine and internal combustion engine having the sameDENSO CORP·Filed 2005·Granted Sep 18, 2007·24 cites·18 claims
- 0792US7389769B2Fuel nature measuring device of internal combustion engine and internal combustion engine having the sameNIPPON SOKEN·Filed 2007·Granted Jun 24, 2008·17 cites·4 claims
- 0891US6689196B2Fuel vapor control apparatusNIPPON SOKEN·Filed 2002·Granted Feb 10, 2004·60 cites·13 claims
- 0990US7409947B2Fuel vapor treatment apparatusDENSO CORP·Filed 2006·Granted Aug 12, 2008·16 cites·12 claims
- 1090US5501198AFuel vapor control apparatus for an internal combustion engineNIPPON DENSO CO·Filed 1995·Granted Mar 26, 1996·60 cites·10 claims
- 1189US6701902B2Activated carbon canisterDENSO CORP·Filed 2002·Granted Mar 9, 2004·29 cites·6 claims
- 1287US7341048B2Fuel vapor treatment apparatusDENSO CORP·Filed 2006·Granted Mar 11, 2008·17 cites·8 claims
- 1387US7219660B2Fuel vapor treatment system for internal combustion engineNIPPON SOKEN·Filed 2005·Granted May 22, 2007·12 cites·30 claims
- 1483US5398660AFuel vapor purging systemNIPPON DENSO CO·Filed 1993·Granted Mar 21, 1995·48 cites·10 claims
- 1581US5743943AEvaporated fuel adsorbing canister preventing diffusion of fuel therethroughNIPPON DENSO CO·Filed 1996·Granted Apr 28, 1998·57 cites·32 claims
- 1679US7373929B2Fuel nature measuring device of internal combustion engine and internal combustion engine having the sameNIPPON SOKEN·Filed 2007·Granted May 20, 2008·8 cites·4 claims
- 1778US7008471B2Filter and canister having the sameNIPPON SOKEN·Filed 2003·Granted Mar 7, 2006·25 cites·10 claims
- 1870US6666072B2Evaporative emission control system and method for detecting leaks thereinDENSO CORP·Filed 2002·Granted Dec 23, 2003·14 cites·2 claims
- 1969US5535719APurge-compensated air-fuel ratio control apparatusNIPPON DENSO CO·Filed 1994·Granted Jul 16, 1996·24 cites·12 claims
- 2067US5601065AFuel evaporation gas transpiration prevention systemNIPPON DENSO CO·Filed 1995·Granted Feb 11, 1997·24 cites·13 claims
- 2164US6634343B2Evaported fuel processor and fault diagnosing apparatus thereforDENSO CORP·Filed 2001·Granted Oct 21, 2003·10 cites·18 claims
- 2262US6394074B1Vapor fuel processing system having canister for absorbing vapor fuel contained in fuel tankDENSO CORP·Filed 2001·Granted May 28, 2002·9 cites·9 claims
- 2362US5915364ACanister for use in evaporative emission control system for automotive vehicleDENSO CORP·Filed 1997·Granted Jun 29, 1999·23 cites·15 claims
- 2440US2006180127A1Canister module and method for absorbing volatile substanceDENSO CORP·Filed 2006·Application pending·0 cites
- 2539US2004231829A1Method for suppressing fuel evaporation from fuel storage device, and fuel storage deviceNIPPON SOKEN·Filed 2004·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →