Inventor · disambiguated record
Ronald J. Herrin
Also filed as: HERRIN RONALD J
8 granted patents·120 citations·filing 1976–2015
86Inventor score
Files withGEN MOTORS CORP4GM GLOBAL TECH OPERATIONS LLC2GM GLOBAL TECH OPERATIONS INC1MORGAN JEFFREY A1
Top patents by PatentIndex Score
8 records- 0190US4054109AEngine with variable valve overlapGEN MOTORS CORP·Filed 1976·Granted Oct 18, 1977·53 cites·7 claims
- 0288US8532908B2System and method for estimating indicated mean effective pressure of cylinders in an engineMORGAN JEFFREY A·Filed 2011·Granted Sep 10, 2013·11 cites·20 claims
- 0375US6837231B1Cylinder bank work output balancing based on exhaust gas A/F ratioGEN MOTORS CORP·Filed 2003·Granted Jan 4, 2005·20 cites·19 claims
- 0467US9759140B2Fifty percent burn crankshaft angle estimation systems and methodsGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Sep 12, 2017·1 cites·20 claims
- 0566US6843214B1Method for balancing engine cylinder bank output using crankshaft sensing and intake cam phasingGEN MOTORS CORP·Filed 2003·Granted Jan 18, 2005·21 cites·8 claims
- 0656US4223648AHydraulic valve lifterGEN MOTORS CORP·Filed 1978·Granted Sep 23, 1980·14 cites·4 claims
- 0749US9759177B2System and method for controlling spark timing based on a duration of a fuel burn within a cylinder in an engineGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Sep 12, 2017·0 cites·18 claims
- 0844US7530337B1High overlap camshaft for improved engine efficiencyGM GLOBAL TECH OPERATIONS INC·Filed 2008·Granted May 12, 2009·0 cites·20 claims
Join the waitlist — get patent alerts
Get an alert when Ronald J. Herrin files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →