Justin E. Ketterer has been granted 7 US patents while listed as an inventor at General Motors . The first was granted in 2020 and the most recent in August 2025. Justin E. Ketterer ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Justin E. Ketterer in LaSalle, ON, CA.
Patents per Year Patents granted per year, 2020 to 2025 Bar chart with a peak of 3 patents in 2021. peak 3 2020: 1 patents 2020 2021: 3 patents 2021 2022: 2 patents 2022 2025: 1 patents 2025
Issued Patents All Time
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Showing 1–7 of 7 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
12392297 Exhaust gas temperature control Andrew Michael Aerts , Robert S. McAlpine , Kenneth L. Briscoe , Kevin M. Luchansky , Pratap S. Murthy 2025-08-19
11280263 Torque-actuated variable compression ratio phaser Ryan M. Heinbuch , Rodney E. Baker , Dumitru Puiu 2022-03-22
$124,287,000
11268437 Eccentric shaft speed change mechanism Erwan Gautier , Ryan M. Heinbuch 2022-03-08
$54,368,000
11149825 Engine assembly including gearbox for varying compression ratio of engine assembly using stationary actuator Ryan M. Heinbuch , Dumitru Puiu , Venu G. Ganti , Rodney E. Baker 2021-10-19
$30,024,000
11131240 Engine assembly including a force splitter for varying compression ratio using an actuator Ryan M. Heinbuch , Dumitru Puiu 2021-09-28
$43,266,000
11092089 Variable compression ratio engine control strategy Ryan M. Heinbuch , Nathan M. Picot , Craig E. Slepicka , Pulasti Bandara , Christopher E. Whitney 2021-08-17
$37,007,000
10787973 Variable compression ratio engine Ryan M. Heinbuch , Rodney E. Baker 2020-09-29
$142,013,000
