Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9664292 | Drive sleeve and sealing mechanism for non-rising stem gate valve | — | 2017-05-30 |
| 8936100 | Drive sleeve and sealing mechanism for non-rising stem gate valve | — | 2015-01-20 |
| 5908046 | Back seat rising stem gate valve | — | 1999-06-01 |
| 5743288 | Valve having provision for replacing stem packing while the valve is under pressure | Frederick A. Hausler, III | 1998-04-28 |