Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6073647 | Valve disk assembly having single orientation | William D. Cook | 2000-06-13 |
| 5924676 | Valve assembly | William D. Cook | 1999-07-20 |
| 5832952 | Valve assembly with reversible stop | William D. Cook | 1998-11-10 |
| 5681028 | Valve assembly | William D. Cook | 1997-10-28 |