Issued Patents 2002
Showing 1–3 of 3 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 |