Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5514314 | Spark plug and method | — | 1996-05-07 |
| 5210458 | Spark plug | — | 1993-05-11 |
| 5133322 | Internal combustion engine ignition system and cleaning device | John W. Lennington | 1992-07-28 |
| 5085192 | Internal combustion engine ignition system and cleaning device | John W. Lennington | 1992-02-04 |
| 5029567 | Internal combustion engine ignition system and cleaning device | John W. Lennington | 1991-07-09 |
| 4993371 | Internal combustion engine ignition system and cleaning device | John W. Lennington | 1991-02-19 |
| 4960093 | Internal combustion engine ignition system and cleaning device | John W. Lennington | 1990-10-02 |
| 4947680 | Separation of variables in an ion gap controlled engine | — | 1990-08-14 |
| 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 |
| 4718381 | Internal combustion engine ignition system | John W. Lennington | 1988-01-12 |
| 4704943 | Impact structures | — | 1987-11-10 |
| 4517540 | Spiral windings | — | 1985-05-14 |
| 4514712 | Ignition coil | — | 1985-04-30 |
| 4471737 | Internal combustion engine ignition system | John W. Lennington | 1984-09-18 |
| 4266421 | Vibration sensors for internal combustion engines | — | 1981-05-12 |
| 4257373 | Internal combustion engine ignition system | John W. Lennington | 1981-03-24 |