Inventor · disambiguated record
Roger J. Hapka
Also filed as: HAPKA ROGER · HAPKA ROGER J
9 granted patents·887 citations·filing 1987–2014
92Inventor score
Top patents by PatentIndex Score
9 records- 0198US5619412ARemote control of engine idling timeCUMMINS ENGINE CO INC·Filed 1994·Granted Apr 8, 1997·381 cites·25 claims
- 0297US5070832AEngine protection systemCUMMINS ENGINE CO INC·Filed 1991·Granted Dec 10, 1991·181 cites·22 claims
- 0395US8827025B2Default open differential control switchHAPKA ROGER J·Filed 2011·Granted Sep 9, 2014·40 cites·18 claims
- 0493US5954617ASystem for controlling internal combustion engine performance in accordance with driver behaviorCUMMINS ENGINE CO INC·Filed 1997·Granted Sep 21, 1999·71 cites·16 claims
- 0591US6306063B1System for controlling combustion engine performance in accordance with driver behaviorCUMMINS ENGINE CO INC·Filed 1999·Granted Oct 23, 2001·114 cites·47 claims
- 0689US7316288B1All terrain vehicle with multiple steering modesPOLARIS INC·Filed 2003·Granted Jan 8, 2008·60 cites·21 claims
- 0783US9358882B2Default open differential control switchPOLARIS INC·Filed 2014·Granted Jun 7, 2016·7 cites·20 claims
- 0879US7278511B1Controller for steering a vehiclePOLARIS INC·Filed 2003·Granted Oct 9, 2007·28 cites·48 claims
- 0935US4771739ACooling system for an internal combustion engineCUMMINS ENGINE CO INC·Filed 1987·Granted Sep 20, 1988·5 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →