Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5870885 | Material compression and insertion device | Harold A. Biddle, Judy K. Hendricks | 1999-02-16 |
| 5159233 | Spark plug and method for assembling a spark plug | Harold P. Sponseller | 1992-10-27 |
| 4643688 | Method for assembling a spark plug | Richard L. Black, Richard S. Podiak | 1987-02-17 |