Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7410578 | Underdrain apparatus and method of manufacturing same | David M. Hambley, Cole Carothers, Govert L. Bassett | 2008-08-12 |
| 7326351 | Filter underdrain system for backwash flow and method for measuring same | David M. Hambley | 2008-02-05 |
| 7138056 | Filter underdrain system for backwash flow and method for measuring same | David M. Hambley | 2006-11-21 |
| 6797166 | Underdrain apparatus | David M. Hambley, Cole Carothers, Govert L. Bassett | 2004-09-28 |