Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE31274 | Engine cooling system flushing apparatus and method | John A. Babish, Douglas C. Appel | 1983-06-14 |
| 4293031 | Engine cooling system flushing apparatus and method | John A. Babish, Douglas C. Appel | 1981-10-06 |
| 4209063 | Engine cooling system flushing apparatus and method | John A. Babish, Douglas C. Appel | 1980-06-24 |