Inventor · disambiguated record
Hirofumi Okahara
Also filed as: OKAHARA HIROFUMI
26 granted patents·633 citations·filing 1988–2004
97Inventor score
Top patents by PatentIndex Score
26 records- 0199US5607373ACVT ratio rate control as a function of throttle release rateNISSAN MOTOR·Filed 1995·Granted Mar 4, 1997·192 cites·2 claims
- 0288US6829528B1Control system and control method for automatic transmissionJATCO LTD·Filed 2003·Granted Dec 7, 2004·30 cites·6 claims
- 0382US5439419APulley device for continuously variable transmissionNISSAN MOTOR·Filed 1994·Granted Aug 8, 1995·39 cites·20 claims
- 0481US5697866AEngine-CVT drivetrain control systemNISSAN MOTOR·Filed 1995·Granted Dec 16, 1997·34 cites·14 claims
- 0578US7222005B2Abnormal oil pressure reduction determination device for vehicle transmissionJATCO LTD·Filed 2003·Granted May 22, 2007·19 cites·13 claims
- 0677US6077187AElectronic transmission control system with fail-safe system for automotive vehicle with continuously variable automatic transmissionNISSAN MOTOR·Filed 1998·Granted Jun 20, 2000·28 cites·26 claims
- 0776US5480361AChange direction planetary gearing for continuously variable transmissionNISSAN MOTOR·Filed 1994·Granted Jan 2, 1996·29 cites·11 claims
- 0875US6246940B1Speed change controller for automatic transmissionNISSAN MOTOR·Filed 1998·Granted Jun 12, 2001·26 cites·8 claims
- 0974US6217469B1Control system for continuously variable transmissionNISSAN MOTOR·Filed 1998·Granted Apr 17, 2001·25 cites·13 claims
- 1073US6007452ALine pressure control system for continuously variable transmission accounting for input load changes caused by inertia during shiftingNISSAN MOTOR·Filed 1998·Granted Dec 28, 1999·25 cites·7 claims
- 1172US5803862AContinuously variable transmission control method and apparatusNISSAN MOTOR·Filed 1997·Granted Sep 8, 1998·24 cites·18 claims
- 1269US5871416AController and control method for continuously variable transmissionNISSAN MOTOR·Filed 1997·Granted Feb 16, 1999·22 cites·12 claims
- 1362US5649457APark lock arrangement for continuously variable transmissionNISSAN MOTOR·Filed 1995·Granted Jul 22, 1997·25 cites·12 claims
- 1453US5435795AVehicle drivetrain control including CVTNISSAN MOTOR·Filed 1994·Granted Jul 25, 1995·21 cites·11 claims
- 1553US5094130AShift control system for automatic power transmission with feature of suppression of shift shock during 4-2 downshiftJATCO CORP·Filed 1989·Granted Mar 10, 1992·12 cites·6 claims
- 1652US6030313AControl system for continuously variable transmissionNISSAN MOTOR·Filed 1998·Granted Feb 29, 2000·12 cites·16 claims
- 1752US4942784ATransmission control system for the automatic transmission of automotive vehicles for gear train locking upon unintended accelerationNISSAN MOTOR·Filed 1988·Granted Jul 24, 1990·11 cites·10 claims
- 1850US6896639B2Prevention of slippage in belt-type continuously variable transmissionJATCO LTD·Filed 2003·Granted May 24, 2005·4 cites·5 claims
- 1948US5249482ARatio control for continuously variable transmissionNISSAN MOTOR·Filed 1992·Granted Oct 5, 1993·11 cites·9 claims
- 2046US6960153B2Clutch engagement control of automatic transmissionJATCO LTD·Filed 2004·Granted Nov 1, 2005·7 cites·9 claims
- 2145US5033330ATransient control of shift in auxiliary gearing for quick engine brakingNISSAN MOTOR·Filed 1990·Granted Jul 23, 1991·10 cites·3 claims
- 2243US5111719AShift control to engine braking or reverse driveNISSAN MOTOR·Filed 1990·Granted May 12, 1992·9 cites·12 claims
- 2339US6220985B1Speed change ratio controller for stepless automatic transmissionNISSAN MOTOR·Filed 1997·Granted Apr 24, 2001·6 cites·10 claims
- 2437US5078662AAutomatic transaxleNISSAN MOTOR·Filed 1989·Granted Jan 7, 1992·5 cites·5 claims
- 2537US5000218AWire harness arrangement of automatic transmissionNISSAN MOTOR·Filed 1989·Granted Mar 19, 1991·6 cites·8 claims
- 2630US5138907ASafeguard for shift control for auxiliary gearing of automatic transmissionNISSAN MOTOR·Filed 1990·Granted Aug 18, 1992·1 cites·19 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →