Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6422585 | Visual alignment aid for connecting trailers | — | 2002-07-23 |
| 6409200 | Visual alignment aid for connecting trailers | — | 2002-06-25 |
| D262772 | Portable circular saw | Harvey C. Rettberg, Richard Ryer, James R. Sistare | 1982-01-26 |
| D262184 | Portable circular saw | Harvey C. Rettberg, Richard Ryer, James R. Sistare | 1981-12-08 |
| 4221051 | Circular saw with improved base plate adjustment | — | 1980-09-09 |