Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4899783 | Pinch valve | Edward M. Yusko, Jr., Cal R. Brown, Peter C. Williams | 1990-02-13 |
| 4893781 | Stem packing assembly for frequent cycling valve | Edward M. Yusko Jr., Peter C. Williams | 1990-01-16 |
| 4877053 | Pinch valve | Edward M. Yusko, Jr., Cal R. Brown, Peter C. Williams | 1989-10-31 |
| 4800920 | Pinch valve | Edward M. Yusko, Jr., Cal R. Brown, Peter C. Williams | 1989-01-31 |