Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5682735 | Gear driven roller brush | Phillip Orland Swenson, Larry N. Smith, Donald Emil Niosi | 1997-11-04 |
| 5678396 | Sectioned grooved roller scraper | Christopher S. Thorman, Phillip Orland Swenson | 1997-10-21 |