Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834216 | Foldable ladder structure and method of manufacturing the same | Thomas J. Schmitt | 1989-05-30 |
| D300365 | Step ladder | Thomas J. Schmitt | 1989-03-21 |
| D300366 | Step ladder back section | Thomas J. Schmitt | 1989-03-21 |