Inventor · disambiguated record
Eric J. Defenderfer
Also filed as: DEFENDERFER ERIC J
6 granted patents·69 citations·filing 2005–2019
80Inventor score
Top patents by PatentIndex Score
6 records- 0197US10247121B2Method and apparatus for determining optimum skip fire firing profileTULA TECHNOLOGY INC·Filed 2015·Granted Apr 2, 2019·24 cites·25 claims
- 0287US10054167B2Driveshaft with two-stage stiffnessGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Aug 21, 2018·5 cites·16 claims
- 0384US7225783B2Engine motion active controlGM GLOBAL TECH OPERATIONS INC·Filed 2005·Granted Jun 5, 2007·32 cites·16 claims
- 0483US9416815B2Driveshaft with two-stage stiffnessGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Aug 16, 2016·8 cites·18 claims
- 0565US10941722B2Method and apparatus for determining optimum skip fire firing profileTULA TECHNOLOGY INC·Filed 2019·Granted Mar 9, 2021·0 cites·20 claims
- 0650US10380988B1Body mounted vehicle noise cancellation systemGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Aug 13, 2019·0 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →