Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8961796 | On-site method of delivering bentonite clay into an effluent stream | — | 2015-02-24 |
| 4997571 | Method of treating water | L. Fred Roensch, Hershel Zamechek, Kelvin Y. Chang | 1991-03-05 |