Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |