Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4759842 | In-line fuel filtering device | David Frees | 1988-07-26 |
| D290348 | Timing light | David Frees | 1987-06-16 |
| D289400 | Electronic fuel pump | David Frees | 1987-04-21 |
| 4537216 | Anti-knock liquid flow control valve | David Frees | 1985-08-27 |
| 4322122 | Cigarette lighter plug assembly | Allan W. Langan | 1982-03-30 |
| 4317468 | Pressure relief valve | Allen W. Langan | 1982-03-02 |
| D260896 | Air compressor | Allen W. Langan | 1981-09-22 |
| 4279355 | Twist-lock container | George E. Robson | 1981-07-21 |
| D258805 | Digital engine analyzer | — | 1981-04-07 |
| D257878 | Air foot pump | — | 1981-01-13 |