Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10418789 | Spark plug with a suppressor that is formed at low temperature | Shuwei Ma, Keith Firstenberg, William J. Walker, Jr. | 2019-09-17 |
| 10177539 | Method and tooling for making an insulator for a condition sensing spark plug | Paul Phillips, William J. Walker, Jr. | 2019-01-08 |