Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10519055 | Aerobic wastewater treatment systems and methods of fabrication | — | 2019-12-31 |
| 8371826 | Geyser pump | Richard G. Dupree | 2013-02-12 |
| D539383 | Trio sewage treatment plant | Hubbard H. Donald | 2007-03-27 |
| D539382 | Duo sewage treatment plant | Hubbard H. Donald | 2007-03-27 |
| 6982033 | Aerobic treatment plant with filter pipe | Hubbard H. Donald | 2006-01-03 |
| D510757 | Trio sewage treatment plant | Hubbard H. Donald | 2005-10-18 |
| 6827850 | Diffusion bar aerobic treatment plant | Hubbard H. Donald | 2004-12-07 |
| 6406619 | Three stage sewage treatment plant | Hubbard H. Donald | 2002-06-18 |
| 6228258 | Sewage treatment system with chlorinator | Hubbard H. Donald | 2001-05-08 |
| 6200472 | Three stage sewage treatment system | Hubbard H. Donald | 2001-03-13 |