Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D291006 | Extrusion for ladder step | Ronald A. Minichillo | 1987-07-21 |
| D272430 | Step plate | Ronald A. Minichillo | 1984-01-31 |
| D258839 | Ladder step | — | 1981-04-07 |
| 4193477 | Ladder structure | — | 1980-03-18 |