Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10312668 | Spark plug having firing pad | Frederick J. Quitmeyer, Nathan A. Thomson, Curtis W. Verhoff, Richard L. Keller | 2019-06-04 |
| 9972978 | Spark plug gasket and method of attaching the same | Jeremy M. Bowman | 2018-05-15 |
| 9893496 | Spark plug having improved ground electrode orientation and method of forming | Nathan A. Thomson, Jeremy M. Bowman | 2018-02-13 |
| 9673593 | Spark plug having firing pad | Frederick J. Quitmeyer, Nathan A. Thomson, Curtis W. Verhoff, Richard L. Keller | 2017-06-06 |
| 9368943 | Spark plug having multi-layer sparking component attached to ground electrode | Frederick J. Quitmeyer, Nathan A. Thomson, Curtis W. Verhoff, Richard L. Keller | 2016-06-14 |
| 9318879 | Spark plug having firing pad | Frederick J. Quitmeyer, Nathan A. Thomson, Curtis W. Verhoff, Richard L. Keller | 2016-04-19 |
| 9236713 | Spark plug having improved ground electrode orientation and method of forming | Patrick M. Gfell, Don R. Gregg | 2016-01-12 |
| 9231379 | Spark plug having firing pad | Nathan A. Thomson, Richard L. Keller | 2016-01-05 |
| 9130356 | Spark plug having a thin noble metal firing pad | Frederick J. Quitmeyer, Nathan A. Thomson, Curtis W. Verhoff, Richard L. Keller | 2015-09-08 |
| 9041274 | Spark plug having firing pad | Frederick J. Quitmeyer, Nathan A. Thomson, Curtis W. Verhoff, Richard L. Keller | 2015-05-26 |
| 8866369 | Spark plug having improved ground electrode orientation and method of forming | Patrick M. Gfell, Donald R. Gregg | 2014-10-21 |
| 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 |
| 8641467 | Spark ignition device and ground electrode therefor and methods of construction thereof | Frederick J. Quitmeyer, Mark S. McMurray | 2014-02-04 |
| 8643262 | Spark ignition device and ground electrode therefor and methods of construction thereof | Frederick J. Quitmeyer, Mark S. McMurray | 2014-02-04 |
| 8569940 | Spark plug having ground electrode tip attached to free end surface of ground electrode | Richard L. Keller | 2013-10-29 |
| 8519607 | Spark plug electrode configuration | Richard L. Keller, Frederick J. Quitmeyer, Richard Llope | 2013-08-27 |
| 8288930 | Spark ignition device and ground electrode therefor and methods of construction thereof | Frederick J. Quitmeyer, Mark S. McMurray | 2012-10-16 |
| 8026654 | Ignition device having an induction welded and laser weld reinforced firing tip and method of construction | Paul Tinwell | 2011-09-27 |
| 7808165 | Spark plug with fine wire ground electrode | — | 2010-10-05 |