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USPTO Patent Rankings Data through Dec 31, 2025
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Douglas E. Trombley — 17 Patents

General Motors: 16 patents #886 of 18,328Top 5%
BRBrunswick: 1 patents #1,187 of 1,392Top 90%
Richmond, MI: #3 of 73 inventorsTop 5%
Michigan: #5,079 of 86,293 inventorsTop 6%
Overall (All Time): #263,971 of 4,157,543Top 7%
17 Patents All Time
Douglas E. Trombley has been granted 17 US patents while listed as an inventor at General Motors. The first was granted in 1987 and the most recent in May 2008. Douglas E. Trombley ranks #263,971 of 4,157,543 US inventors in our database (top 6.3%). Patent records list Douglas E. Trombley in Richmond, MI, US.

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7370521 Method to detect a contaminated fuel injector Nils Sandmann, Noboru Takahashi, Jeffrey J. Allen, Dietmar Mueller, Thomas Wagner +2 more 2008-05-13 $5,355,000
7127346 Dynamic engine pumping work estimation algorithm Kenneth J. Buslepp, John M. Gunselman 2006-10-24 $33,758,000
7027905 Mass air flow estimation based on manifold absolute pressure Ljubisa M. Mladenovic, Kenneth J. Buslepp 2006-04-11 $20,585,000
6253742 Fuel supply method for a marine propulsion engine Timothy P. Wickman, Erivn H. Voss, Jr. 2001-07-03 $16,698,000
5857163 Adaptive engine control responsive to catalyst deterioration estimation Kenneth J. Buslepp, Aidan Michael Miller 1999-01-05
5629593 Output torque matching in a multi-speed electric vehicle Frederick J. Pollock 1997-05-13
5331939 Transient fueling compensation Kenneth J. Buslepp, William C. Albertson 1994-07-26
5289812 Internal combustion engine air/fuel ratio compensation Kenneth J. Buslepp, William C. Albertson 1994-03-01
5163398 Engine idle speed control based upon fuel mass flow rate adjustment Kenneth J. Buslepp, Ronald J. Sikarskie 1992-11-17
5119781 Control of engine fuel injection during transitional periods associated with deceleration fuel cut-off Kenneth J. Buslepp, Paul E. Reinke, Steven Stiles, Kenneth G. Macklem 1992-06-09
5094206 Method for controlling a crankcase scavenged two-stroke engine during deceleration fuel cut-off Kenneth J. Buslepp, Paul E. Reinke 1992-03-10
5080064 Adaptive learning control for engine intake air flow Kenneth J. Buslepp, Mark G. Kosowski 1992-01-14
5051909 Method and means for determining exhaust backpressure in a crankcase scavenged two-stoke engine Aparicio J. Gomez, Dennis Montville 1991-09-24
4958609 Fuel injection timing control for a crankcase scavenged two-stroke engine Kenneth J. Buslepp, Cathy C. Lillie, Marcel R. Wancket 1990-09-25
4955341 Idle control system for a crankcase scavenged two-stroke engine Kenneth J. Buslepp 1990-09-11
4920789 Method and means for determining air mass in a crankcase scavenged two-stroke engine Aparicio J. Gomez, Kenneth J. Buslepp 1990-05-01
4706628 Engine combustion control responsive to location and magnitude of peak combustion pressure 1987-11-17