Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4313458 | Restricted movement valve seats for an expanding gate valve | William R. Hochmuth | 1982-02-02 |
| 4246928 | Restricted movement valve seats for an expanding gate valve | William R. Hochmuth | 1981-01-27 |