Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673733 | Engine coolant removal and refill method and device | David E. Turcotte, John J. Conville, Stephen M. Zeld, James T. Lyon | 1997-10-07 |
| 5649574 | Engine coolant removal and refill method and device | David E. Turcotte, John J. Conville, Stephen M. Zeld, James T. Lyon | 1997-07-22 |