Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8079136 | Method for forming layered heating element for glow plug | William J. Walker, Jr., James L. May | 2011-12-20 |
| 8012898 | Ceramic with improved high temperature electrical properties for use as a spark plug insulator | William J. Walker, Jr. | 2011-09-06 |
| 8013502 | Small-diameter spark plug with resistive seal | — | 2011-09-06 |
| 7969077 | Spark plug with an improved seal | — | 2011-06-28 |