Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4947807 | Internal combustion engine | John D. Flaig, Gene F. Baltz, Henry C. Billingsley, David Hartke, Chester G. DuBois +1 more | 1990-08-14 |
| 4757792 | Internal combustion engine | John D. Flaig, Gene F. Baltz, Henry C. Billingsley, David J. Hartke, Chester G. DuBois +1 more | 1988-07-19 |