Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8164241 | Extension-type spark plug | Kevin L. Miller | 2012-04-24 |
| 7825573 | 14 mm extension spark plug | Robert D. Freeman | 2010-11-02 |
| 7795791 | One piece shell high thread spark plug | Michael S Joseph, Mark S. McMurray | 2010-09-14 |
| 7768183 | Extension spark plug | Ellen M. Hively | 2010-08-03 |
| 4307689 | Glow plug control circuit | Frank J. Raeske, Robert A. Mahaney | 1981-12-29 |