Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4695759 | Method for producing a composite center electrode and an electrode | — | 1987-09-22 |
| 4643688 | Method for assembling a spark plug | Dale L. Byerly, Richard L. Black | 1987-02-17 |
| 4584977 | Low engine oil sensing switch | Michael Lenk | 1986-04-29 |
| 4526551 | Production of electrodes | Albert L. Hoffmanner, Sheldon L. Semiatin | 1985-07-02 |
| 4522170 | Low engine oil sensing method | Michael Lenk | 1985-06-11 |
| 4193012 | Spark plug seal | LeRoy H. Houghton, Paul E. Rempes, Jr. | 1980-03-11 |