Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877053 | Pinch valve | Edward M. Yusko, Jr., Terry M. Kalain, Peter C. Williams | 1989-10-31 |
| 4800920 | Pinch valve | Edward M. Yusko, Jr., Terry M. Kalain, Peter C. Williams | 1989-01-31 |