Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4303223 | Valve facing for sliding valve elements or the like | Fred S. Whisenhunt | 1981-12-01 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4303223 | Valve facing for sliding valve elements or the like | Fred S. Whisenhunt | 1981-12-01 |