Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6426586 | Contact glass composition for use in spark plugs | Ching T. Young, Philip R. Woodruff, Duane L. Schreiner, Ralph Frederick, Jeff A. Goldacker | 2002-07-30 | $35,935,000 |