Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5607060 | Method and apparatus for removing metal contamination from soil | William E. Fristad, Jeffrey L. Narum, Phillip L. Mattison, Michael J. Virnig | 1997-03-04 |
| 5466426 | Method and apparatus for removing metal contamination from soil | William E. Fristad, Jeffrey L. Narum, Phillip L. Mattison, Michael J. Virnig | 1995-11-14 |
| 5454917 | Apparatus and process for recovering metal from an aqueous solution | Phillip L. Mattison, William E. Friestad | 1995-10-03 |
| 4291602 | Panel cutting device | Harvey Williams | 1981-09-29 |