Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4351292 | Poppet valve shield | Roger P. Worthen | 1982-09-28 |
| 4346870 | Thermal barrier for poppet valve | Richard Chute, Theodore N. Tunnecliffe, Roger P. Worthen | 1982-08-31 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4351292 | Poppet valve shield | Roger P. Worthen | 1982-09-28 |
| 4346870 | Thermal barrier for poppet valve | Richard Chute, Theodore N. Tunnecliffe, Roger P. Worthen | 1982-08-31 |