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USPTO Patent Rankings Data through Sept 30, 2025
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Frank Ament — 50 Patents

General Motors: 50 patents #152 of 18,328Top 1%
Rochester, MI: #11 of 860 inventorsTop 2%
Michigan: #929 of 86,293 inventorsTop 2%
Overall (All Time): #54,825 of 4,157,543Top 2%
50 Patents All Time

Issued Patents All Time

Showing 26–50 of 50 patents

Patent #TitleCo-InventorsDate
6908498 Carbon-concentrated microwave regenerated diesel particulate trap Eugene V. Gonze 2005-06-21
6868837 Cold start fuel vapor enrichment 2005-03-22
6857264 Exhaust emission aftertreatment 2005-02-22
6823840 Manifold absolute pressure control system and method for a hybrid electric vehicle Goro Tamai 2004-11-30
6769400 Method for controlling emissions 2004-08-03
6709489 Microwave regenerated diesel particulate trap Eugene V. Gonze 2004-03-23
6687602 Method and apparatus for adaptable control of a variable displacement engine 2004-02-03
6422003 NOX catalyst exhaust feedstream control system David Brown, David Frank 2002-07-23
6293092 NOx adsorber system regeneration fuel control David Brown, David Frank 2001-09-25
6079396 Automotive cold start fuel volatility compensation David Brown 2000-06-27
5630571 Exhaust flow control valve Melvin D. Kipp, David A. Singer, Mehrnam Sharif-Bakhtiar 1997-05-20
5570576 Catalyst heater with staged exhaust exotherm David Brown 1996-11-05
5492679 Zeolite/catalyst wall-flow monolith adsorber David A. Singer 1996-02-20
5390488 Air injection control for preheated catalysts David A. Singer, David Brown 1995-02-21
5284016 Exhaust gas burner reactor Terrance L. Stark, Joel L. Toof 1994-02-08
5216409 Method and apparatus for detecting a contaminated alcohol-gasoline fuel mixture Eugene V. Gonze 1993-06-01
5179926 Alcohol discriminator and fuel control for an internal combustion engine fueled with alcohol-gasoline fuel mixtures 1993-01-19
5099814 Fuel distributing and injector pump with electronic control 1992-03-31
4653315 Engine top dead center locating method Richard A. Peden, Pamela I. Labuhn 1987-03-31
4597368 Engine idle speed control system 1986-07-01
4596221 Transient injection timing control Richard A. Peden 1986-06-24
4539956 Diesel fuel injection pump with adaptive torque balance control James F. Hengel, Donald John Armstrong, Marc B. Center, John E. Ausen 1985-09-10
4509478 Engine fuel control system Richard A. Peden, John E. Ausen 1985-04-09
4497298 Diesel fuel injection pump with solenoid controlled low-bounce valve 1985-02-05
4351283 Diesel fuel injection pump secondary fuel metering control system 1982-09-28