Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9955829 | Method and apparatus for controlling odors | Don S. Sifers | 2018-05-01 |
| 9265389 | Method and apparatus for controlling odors | Don S. Sifers | 2016-02-23 |
| 9017606 | Method and apparatus for controlling odors | Don S. Sifers | 2015-04-28 |
| 8784739 | Method and apparatus for controlling fecal odors | Don S. Sifers | 2014-07-22 |
| 8475718 | Method and apparatus for controlling fecal odors | Don S. Sifers | 2013-07-02 |
| 5218864 | Layer density determination using surface and deviated borehole gravity values | — | 1993-06-15 |