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Patent applications and USPTO patent grants for Callahan; Richard E..The latest application filed is for "extension-type spark plug".
Patent | Date |
---|---|
Extension-type spark plug Grant 8,164,241 - Miller , et al. April 24, 2 | 2012-04-24 |
14 mm extension spark plug Grant 7,825,573 - Callahan , et al. November 2, 2 | 2010-11-02 |
One piece shell high thread spark plug Grant 7,795,791 - Joseph , et al. September 14, 2 | 2010-09-14 |
Extension spark plug Grant 7,768,183 - Callahan , et al. August 3, 2 | 2010-08-03 |
Extension-type Spark Plug App 20100068905 - Miller; Kevin L. ;   et al. | 2010-03-18 |
14 Mm Extension Spark Plug App 20080218053 - Callahan; Richard E. ;   et al. | 2008-09-11 |
Extension spark plug App 20080054777 - Callahan; Richard E. ;   et al. | 2008-03-06 |
One Piece Shell High Thread Spark Plug App 20080030116 - Joseph; Michael S. ;   et al. | 2008-02-07 |
Spark plug tester ignition system Grant 4,032,842 - Green , et al. June 28, 1 | 1977-06-28 |
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