Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D415052 | Self-centering alignment ring | Terry L. Dougherty | 1999-10-12 |
| 5738140 | Adjustable height extension stem and valve box assembly | — | 1998-04-14 |
| 4968002 | Boltless bonnet assembly for gate valve | Henry B. Gibson, Roland Larkin | 1990-11-06 |