Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
JE

James A. Eng — 30 Patents

General Motors: 21 patents #624 of 18,328Top 4%
VAVoith Sulzer Paper Technology North America: 7 patents #6 of 28Top 25%
University of Michigan: 3 patents #689 of 4,352Top 20%
VGVoith Paper Gmbh: 1 patents #6 of 18Top 35%
JDJohn Deere: 1 patents #2,985 of 5,518Top 55%
Appleton, WI: #63 of 1,506 inventorsTop 5%
Wisconsin: #1,017 of 40,088 inventorsTop 3%
Overall (All Time): #121,623 of 4,157,543Top 3%
30 Patents All Time
James A. Eng has been granted 30 US patents while listed as an inventor at General Motors. The first was granted in 1997 and the most recent in September 2010. James A. Eng ranks #121,623 of 4,157,543 US inventors in our database (top 2.9%). Patent records list James A. Eng in Appleton, WI, US.

Patents per Year

Patents granted per year, 1997 to 2010Bar chart with a peak of 8 patents in 2006.peak 81997: 1 patents19972000: 2 patents20002001: 2 patents20012002: 3 patents20022005: 2 patents20052006: 8 patents20062007: 3 patents20072008: 6 patents20082009: 2 patents20092010: 1 patents2010

Issued Patents All Time

Showing 1–25 of 30 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7802553 Method to improve combustion stability in a controlled auto-ignition combustion engine Paul M. Najt, Tang-Wei Kuo, Rodney B. Rask 2010-09-28
7637251 Method and apparatus to determine magnitude of combustion chamber deposits Tang-Wei Kuo, Paul M. Najt, Rodney B. Rask, Orgun A. Guralp, Zoran S. Filipi +2 more 2009-12-29
7478620 Method and apparatus to control a transition between HCCI and SI combustion in a direct-injection gasoline engine Tang-Wei Kuo, Paul M. Najt, Nicole Wermuth 2009-01-20 $2,666,000
7370633 Load transient control methods for direct-injection engines with controlled auto-ignition combustion Jun-Mo Kang, Chen-Fang Chang, Zongxuan Sun, Tang-Wei Kuo, Barry L. Brown +2 more 2008-05-13 $5,355,000
7370616 Method for transition between controlled auto-ignition and spark ignition modes in direct fuel injection engines Tang-Wei Kuo, Zongxuan Sun, Jun-Mo Kang, Chen-Fang Chang, Barry L. Brown +2 more 2008-05-13 $5,355,000
7367313 Speed transient control methods for direct-injection engines with controlled auto-ignition combustion Chen-Fang Chang, Zongxuan Sun, Jun-Mo Kang, Tang-Wei Kuo, Barry L. Brown +2 more 2008-05-06 $4,977,000
7367319 Method and apparatus to determine magnitude of combustion chamber deposits Tang-Wei Kuo, Paul M. Najt, Rodney B. Rask, Orgun A. Guralp, Zoran S. Filipi +2 more 2008-05-06 $4,977,000
7367308 Method for load transient control between lean and stoichiometric combustion modes of direct-injection engines with controlled auto-ignition combustion Tang-Wei Kuo, Jun-Mo Kang, Chen-Fang Chang, Zongxuan Sun, Barry L. Brown +2 more 2008-05-06 $4,977,000
7337762 Fuel adaptation in a homogeneous charge compression ignition engine William Leppard, Paul M. Najt, Tang-Wei Kuo 2008-03-04 $11,966,000
7275514 Method of HCCI and SI combustion control for a direct injection internal combustion engine Tang-Wei Kuo, Zongxuan Sun, Barry L. Brown, Paul M. Najt, Jun-Mo Kang +2 more 2007-10-02 $12,008,000
7246597 Method and apparatus to operate a homogeneous charge compression-ignition engine Tang-Wei Kuo, Paul M. Najt, Rodney B. Rask 2007-07-24 $7,389,000
7228839 NOx emission control for a controlled auto-ignition four-stroke internal combustion engine Tang-Wei Kuo, Paul M. Najt, Barry L. Brown, Chen-Fang Chang, Jun-Mo Kang 2007-06-12 $20,414,000
7152559 Valve and fueling strategy for operating a controlled auto-ignition four-stroke internal combustion engine Tang-Wei Kuo, Barry L. Brown, Paul M. Najt, David Cleary 2006-12-26 $8,022,000
7128062 Method for mid load operation of auto-ignition combustion Tang-Wei Kuo, Paul M. Najt, Junseok Chang, Zoran S. Filipi, Dionissios N. Assanis +1 more 2006-10-31 $9,131,000
7111454 Fuel control compensation for secondary air system flow variation Stephen Fulcher, Richard B. Jess, Patrick L. Risse, Stuart R. Smith 2006-09-26 $15,742,000
7080613 Method for auto-ignition combustion control Tang-Wei Kuo, Barry L. Brown 2006-07-25 $18,094,000
7059281 Four stroke engine auto-ignition combustion Tang-Wei Kuo, Paul M. Najt, Barry L. Brown 2006-06-13 $6,736,000
7021277 Valve and fueling strategy for operating a controlled auto-ignition four-stroke internal combustion engine Tang-Wei Kuo, Barry L. Brown, Paul M. Najt 2006-04-04 $6,726,000
7004124 Valve strategy for operating a controlled auto-ignition four-stroke internal combustion engine Tang-Wei Kuo, Barry L. Brown, Paul M. Najt 2006-02-28 $6,431,000
6994072 Method for mid load operation of auto-ignition combustion Tang-Wei Kuo, Barry L. Brown, Paul M. Najt 2006-02-07 $21,813,000
6971365 Auto-ignition gasoline engine combustion chamber and method Paul M. Najt, Tang-Wei Kuo, David Cleary, Barry L. Brown 2005-12-06 $12,795,000
6860030 Control system for gap measuring Edwin X. Graf, David W. Root 2005-03-01
6491754 Carbon fiber doctor blade Edwin X. Graf 2002-12-10
6368458 Calender press for a paper-making machine with thermally compensated top and bottom rolls and low nip load Edwin X. Graf 2002-04-09
6347619 Exhaust gas recirculation system for a turbocharged engine Todd Mathew Whiting 2002-02-19 $26,836,000