Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8680758 | Spark plug having a plastic upper insulator and method of construction | Kevin L. Miller, Richard L. Keller, William J. Walker, Jr., James D. Lykowski, Shuwei Ma +7 more | 2014-03-25 |
| 8079136 | Method for forming layered heating element for glow plug | William J. Walker, Jr., John W. Hoffman | 2011-12-20 |
| 7895926 | Die cutting under vacuum through rollers | David Hunwick | 2011-03-01 |
| 7572480 | Method of fabricating a multilayer ceramic heating element | John W. Hoffman, William J. Walker, Jr. | 2009-08-11 |
| 6881016 | Core retainer | — | 2005-04-19 |
| 4793540 | Pallet system | Steven J. Mangan | 1988-12-27 |