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Troy, MI, United States of America

Ronald J Herrin

USPTO Granted Patents = 8

Average Co-Inventor Count = 2.0

ph-index = 5

Forward Citations = 54(Granted Patents)

Location History:

Clawson, MI (US) (1977 - 1980)
Troy, MI (US) (2005 - 2017)

Company Filing History:

8 out of 30,943

Gm Global Technolgoy Operations, Inc.

Years Active: 1977-2017

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8 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9759177 - System and method for controlling spark timing based on a duration of a fuel burn within a cylinder in an engine (2017-09-12),

2. 9759140 - Fifty percent burn crankshaft angle estimation systems and methods (2017-09-12),

3. 8532908 - System and method for estimating indicated mean effective pressure of cylinders in an engine (2013-09-10),

4. 7530337 - High overlap camshaft for improved engine efficiency (2009-05-12),

5. 6843214 - Method for balancing engine cylinder bank output using crankshaft sensing and intake cam phasing (2005-01-18),

6. 6837231 - Cylinder bank work output balancing based on exhaust gas A/F ratio (2005-01-04),

7. 4223648 - Hydraulic valve lifter (1980-09-23),

8. 4054109 - Engine with variable valve overlap (1977-10-18),

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