Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D314746 | Dual connecting block | Chris G. Johnson, Kristin E. Olson, William T. Spitz | 1991-02-19 |
| D312070 | Connecting block | Chris G. Johnson, Kristin E. Olson, William T. Spitz | 1990-11-13 |
| 4478103 | Worm gear mechanism | — | 1984-10-23 |