Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7005064 | Method and apparatus for remediating wastewater holding areas and the like | Robert Anthony Keller, William J. Cretens, Kent T. Depuydt, Dana J. Trierweiler, Russell D. Johnson | 2006-02-28 |
| 6835314 | Method and apparatus for remediating wastewater holding areas and the like | Robert Anthony Keller, William J. Cretens, Kent T. Depuydt, Dana J. Trierweiler, Russell D. Johnson | 2004-12-28 |
| 5481856 | Method and apparatus for cutting aquatic vegetation | Ricard J. Wickoren | 1996-01-09 |
| 5267830 | Pump for abrasive materials | Richard J. Wickoren, Troy L. Pennington, Lawrence E. Klote, Lawrence R. Gardner, Ronald L. Dellinger | 1993-12-07 |
| 4981366 | Method and apparatus for mixing liquid contents in a vessel | — | 1991-01-01 |
| 4904159 | Pump impeller | — | 1990-02-27 |
| 4474713 | Inclined tubular aeration apparatus | — | 1984-10-02 |