Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6382591 | Plug valve assembly | David Bowers, Robert Joseph Brown, Royce Chaffin, Gerald Patrick McDermott | 2002-05-07 |
| 5746417 | Adjustable ball valve | David Bowers, Robert Joseph Brown, Royce Chaffin, Gerald Patrick McDermott | 1998-05-05 |