Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5975122 | Replaceable flow-control assembly for use in a fluid flow line | Larry H. Hazen, Donald K. Day | 1999-11-02 |
| 4554943 | Single disc rotary valve | Herbert H. Walton, Steven D. Kehoe, Kimball R. Barron | 1985-11-26 |