Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Eric J. Defenderfer — 6 Patents

General Motors: 6 patents #2,630 of 18,328Top 15%
TETula Etechnology: 2 patents #49 of 93Top 55%
Brighton, MI: #131 of 809 inventorsTop 20%
Michigan: #15,817 of 86,293 inventorsTop 20%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Eric J. Defenderfer has been granted 6 US patents while listed as an inventor at General Motors. The first was granted in 2007 and the most recent in March 2021. Eric J. Defenderfer ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Eric J. Defenderfer in Brighton, MI, US.

Patents per Year

Patents granted per year, 2007 to 2021Bar chart with a peak of 2 patents in 2019.peak 22007: 1 patents20072016: 1 patents20162018: 1 patents20182019: 2 patents20192021: 1 patents2021

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10941722 Method and apparatus for determining optimum skip fire firing profile Mark A. Shost, Louis J. Serrano, Steven E. Carlson, Vijay Srinivasan, Nitish J. Wagh +4 more 2021-03-09
10380988 Body mounted vehicle noise cancellation system Frank C. Valeri, Scott M. Reilly 2019-08-13 $7,279,000
10247121 Method and apparatus for determining optimum skip fire firing profile Mark A. Shost, Louis J. Serrano, Steven E. Carlson, Vijay Srinivasan, Nitish J. Wagh +4 more 2019-04-02
10054167 Driveshaft with two-stage stiffness Paul A. Piorkowski, Michael J. Grimmer, Mark A. Gehringer, Stephanie A. Erntser, Stephen H. Miller 2018-08-21 $9,824,000
9416815 Driveshaft with two-stage stiffness Michael J. Grimmer, Mark A. Gehringer, Stephanie A. Ernster, Stephen H. Miller 2016-08-16 $9,035,000
7225783 Engine motion active control Frederick P. Hohnstadt, Steven A. Tervo, Eric N. Jacobson, Brian E. Ferrari, Donald R. Elzinga, Jr. +3 more 2007-06-05 $7,487,000