Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6464155 | Method of processing animal waste and parts | Willis R. Campbell | 2002-10-15 |
| 6412716 | Method and apparatus for processing municipal sludge waste | Willis R. Campbell | 2002-07-02 |
| 6398138 | Method of extracting nylon fiber from a comminuter | Willis R. Campbell | 2002-06-04 |
| 6126096 | Method and apparatus for separating and recovering fractional components of carpet | Willis R. Campbell | 2000-10-03 |
| 5908164 | Method and apparatus for separating and recovering fractional components of carpet | Willis R. Campbell | 1999-06-01 |
| 5727740 | Method and apparatus for recovering fractional components of soil | Willis R. Campbell | 1998-03-17 |
| 5637152 | Soil washing apparatus and method | Willis R. Campbell | 1997-06-10 |
| 5611363 | Oil spill cleaner | Willis R. Campbell, Bruce A. Perry, Dan Schwlefert | 1997-03-18 |
| 5423340 | Apparatus for removing an oil spill on a body of water | Willis R. Campbell, Bruce A. Perry, Dan Schwlefert | 1995-06-13 |
| 5316029 | Oil separator | Willis R. Campbell, Bruce A. Perry, Dan Schwiefert | 1994-05-31 |