Inventor · disambiguated record
Koichi Toyama
Also filed as: TOYAMA KOICHI
28 granted patents·304 citations·filing 1971–2018
97Inventor score
Top patents by PatentIndex Score
28 records- 0182US4773380ACurrent flowing time period control system for ignition coil of internal combustion engineNIPPON DENSO CO·Filed 1987·Granted Sep 27, 1988·21 cites·5 claims
- 0282US4167927AContactless ignition control system with a dwell time control circuit for an internal combustion engineNIPPON DENSO CO·Filed 1977·Granted Sep 18, 1979·20 cites·6 claims
- 0382US4033634AAntiskid control device for vehiclesNIPPON DENSO CO·Filed 1975·Granted Jul 5, 1977·17 cites·8 claims
- 0476US6710545B2Discharge lamp apparatus having directly coupled lamp and electronic controllerDENSO CORP·Filed 2002·Granted Mar 23, 2004·22 cites·20 claims
- 0574US8223987B2Attachment structure for a sound generating apparatusSHIBATA KIYOSEI·Filed 2007·Granted Jul 17, 2012·11 cites·11 claims
- 0673US9950663B2Electronic vehicle hornIMASEN ELECTRIC IND·Filed 2016·Granted Apr 24, 2018·2 cites·20 claims
- 0770US11308930B2Electronic hornIMASEN ELECTRIC IND·Filed 2017·Granted Apr 19, 2022·2 cites·21 claims
- 0867US5600208ADischarge lamp unit having separable high-voltage transformer safeguardNIPPON DENSO CO·Filed 1995·Granted Feb 4, 1997·27 cites·15 claims
- 0967US4094556AAnti-skid system for a vehicleNIPPON DENSO CO·Filed 1971·Granted Jun 13, 1978·19 cites·8 claims
- 1065US5751121AHigh voltage discharge bulb controlDENSO CORP·Filed 1996·Granted May 12, 1998·25 cites·8 claims
- 1161US6720740B2Discharge lamp ballast circuit having snubber circuitDENSO CORP·Filed 2002·Granted Apr 13, 2004·8 cites·11 claims
- 1261US5216369AIgnition occurrence detecting device for use in an ignition apparatusNIPPON DENSO CO·Filed 1992·Granted Jun 1, 1993·12 cites·16 claims
- 1360US5910712AMethod and apparatus for reduced discharge lamp driver test timeDENSO CORP·Filed 1997·Granted Jun 8, 1999·20 cites·8 claims
- 1457US5706185AControl apparatus for a lighting system of a discharge lamp used in various types of vehiclesNIPPON DENSO CO·Filed 1996·Granted Jan 6, 1998·19 cites·22 claims
- 1555US6291945B1Discharge lamp lighting deviceNIPPON DENSO CO·Filed 1996·Granted Sep 18, 2001·17 cites·10 claims
- 1654US5880563ADevice for accurately detecting end of usage lifetime of a discharge lampDENSO CORP·Filed 1997·Granted Mar 9, 1999·16 cites·19 claims
- 1751US6642668B2Discharge lamp device for reducing noise radiation and surge pulse currentDENSO CORP·Filed 2002·Granted Nov 4, 2003·4 cites·13 claims
- 1850US6700328B2Discharge lamp driver circuit designed to minimize radiation or noiseDENSO CORP·Filed 2002·Granted Mar 2, 2004·3 cites·7 claims
- 1949US6672747B2Vehicle headlamp having removable lighting control unitDENSO CORP·Filed 2002·Granted Jan 6, 2004·6 cites·11 claims
- 2048US4572151AIgnition system for internal combustion enginesNIPPON DENSO CO·Filed 1984·Granted Feb 25, 1986·6 cites·7 claims
- 2144US5404854AKnock control system for internal combustion engineNIPPON DENSO CO·Filed 1993·Granted Apr 11, 1995·11 cites·20 claims
- 2243US4027926AAnti-skid control system for vehiclesNIPPON DENSO CO·Filed 1975·Granted Jun 7, 1977·4 cites·13 claims
- 2339US6670778B2AC power generating apparatus having electrolytic capacitor and ceramic capacitorDENSO CORP·Filed 2002·Granted Dec 30, 2003·0 cites·10 claims
- 2438US11145286B2Electronic hornIMASEN ELECTRIC IND·Filed 2018·Granted Oct 12, 2021·0 cites·20 claims
- 2536US4475520AContactless erroneous ignition prevention type ignition system for internal combustion engineNIPPON DENSO CO·Filed 1982·Granted Oct 9, 1984·3 cites·3 claims
- 2635US4741319AIgnition system for internal combustion enginesNIPPON DENSO CO·Filed 1987·Granted May 3, 1988·3 cites·11 claims
- 2732US5608815ADevice for testing an image of a test objectFUJI ELECTRIC CO LTD·Filed 1994·Granted Mar 4, 1997·3 cites·9 claims
- 2831US4809668AIgnition system for internal combustion engineNIPPON DENSO CO·Filed 1987·Granted Mar 7, 1989·3 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →