Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7059926 | Method of making a spark plug having a multi-tiered center wire assembly | Mark S. McMurray, Lawrence Geer | 2006-06-13 |
| 7019448 | Spark plug having a multi-tiered center wire assembly | Mark S. McMurray, Lawrence Geer | 2006-03-28 |