Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7645956 | Fail safe membrane switches | Henry G. Weber, Manuel Estrada, Jeffrey F. Johnson, Edward W. Duhon | 2010-01-12 |
| 5704656 | Adjustable pipe entrance seal | — | 1998-01-06 |
| 5295760 | Testable bulkhead | — | 1994-03-22 |
| 4584057 | Membrane processes for separation of organic acids from kraft black liquors | Harry P. Gregor | 1986-04-22 |