Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869175 | Impact structures | — | 1989-09-26 |
| 4837544 | Spiral windings | — | 1989-06-06 |
| 4821697 | Fuel octane evaluation system | — | 1989-04-18 |
| 4809662 | Internal combustion engine ignition system | John W. Lennington | 1989-03-07 |