Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5036875 | Hydrocarbon monitoring valve | — | 1991-08-06 |
| 4790446 | Floating roof drain system | — | 1988-12-13 |
| 4308968 | Secondary seal for tank having floating roof | T. Richard Mathews, Walter Hurst | 1982-01-05 |