Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5902976 | System for separating waste materials by enhanced water floatation | — | 1999-05-11 |
| 4938495 | Trailer hitch positioning apparatus | Paul J. Hanson | 1990-07-03 |
| 4852901 | Trailer hitch positioning apparatus | Paul J. Hanson | 1989-08-01 |