Patents per Year
Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6426586 | Contact glass composition for use in spark plugs | Philip R. Woodruff, Duane L. Schreiner, Harold E. Dunfee, Ralph Frederick, Jeff A. Goldacker | 2002-07-30 | $35,935,000 |
| 4294668 | Method of measuring oxygen and process for pretreating a solid electrolyte oxygen gas sensing element | — | 1981-10-13 | $2,073,000 |
| 4186071 | Process for producing oxygen gas sensor elements | Donald J. Romine, Donald C. Davis, Phillip R. Woodruff, James D. Bode, Tseng-Ying Tien | 1980-01-29 | $2,022,000 |