Joseph R. Littlefield has been granted 21 US patents while listed as an inventor at General Motors . The first was granted in 2014 and the most recent in July 2022. Joseph R. Littlefield ranks #201,324 of 4,157,543 US inventors in our database (top 4.8%). Patent records list Joseph R. Littlefield in Sterling Heights, MI, US.
Patents per Year Patents granted per year, 2014 to 2022 Bar chart with a peak of 7 patents in 2019. peak 7 2014: 1 patents 2014 2017: 2 patents 2017 2018: 5 patents 2018 2019: 7 patents 2019 2020: 3 patents 2020 2021: 2 patents 2021 2022: 1 patents 2022 Issued Patents All Time
Showing 1–21 of 21 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
11383593 Electric drive unit clutch Alan G. Holmes , Pete R. Garcia 2022-07-12
$19,860,000
11035448 Multi-axis final drive assembly Alan G. Holmes 2021-06-15
$49,101,000
10982745 Planetary differential drive system Alan G. Holmes , Brendan M. Conlon 2021-04-20
$26,620,000
10697524 Motor vehicle powertrain Alan G. Holmes , Rebecca K. Risko Cattell 2020-06-30
$11,542,000
10557536 Multi-axis final drive assembly Alan G. Holmes 2020-02-11
$12,010,000
10533640 Two ratio electric drive unit Craig S. Ross 2020-01-14
$24,813,000
10500938 Motor vehicle powertrain Alan G. Holmes , Rebecca K. Risko Cattell 2019-12-10
$13,646,000
10377221 Powertrain including modular drive unit Alan G. Holmes 2019-08-13
$7,279,000
10300905 Electric vehicle drive using combined differential and reduction gearing Alan G. Holmes , Min-Joong Kim , Edward A. Rapa, Jr. , Brendan M. Conlon , Donald L. Dusenberry 2019-05-28
$22,084,000
10247252 Dog clutch for a vehicle transmission Jonathan Boyd 2019-04-02
10234019 Planetary gear set bearing retainer Pete R. Garcia 2019-03-19
$13,540,000
10190643 Synchronizer for radially applied dog clutch for a vehicle Jonathan Boyd 2019-01-29
10167906 Clutch assembly having a hydraulically actuate piston and latching device Vijay A. Neelakantan , Lawrence A. Kaminsky 2019-01-01
10138947 Radially applied dog clutch with bi-directional ratcheting for a vehicle transmission Jonathan Boyd 2018-11-27
10124661 Power-split hybrid powertrain Alan G. Holmes , Rebecca K. Risko Cattell 2018-11-13
$12,451,000
10094427 Ball cam actuated dog clutch Pete R. Garcia 2018-10-09
$21,978,000
10036458 Multi-axis final drive assembly Alan G. Holmes 2018-07-31
$13,022,000
9950607 Powertrain with multi-planetary, single motor drive unit Pete R. Garcia , Alan G. Holmes 2018-04-24
$10,227,000
9840140 Compound-power-split electrically variable transmissions with motor clutching devices Alan G. Holmes 2017-12-12
$25,725,000
9574619 Pawl grounding clutch with synchronizer — 2017-02-21
$8,265,000
8813896 Vehicle Anthony P. Tata , Michael O. Harpster, Jr. 2014-08-26
$6,237,000
