Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5203857 | Gas compressor head and discharge valve construction | Gerald L. Terwilliger, Robert D. Douglas, Milton M. Kosfeld | 1993-04-20 |
| 5080130 | Gas compressor head and discharge valve construction | Gerald L. Terwilliger, Robert D. Douglas, Milton M. Kosfeld | 1992-01-14 |