Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5077844 | Mechanical apparatus for lifting and moving humans | Elden K. Twitchell | 1992-01-07 |
| D266499 | Invalid chair | Brent L. Twitchell | 1982-10-12 |
| 4351562 | Movable seat for a motorized transport chair | Brent L. Twitchell, Brent W. Zitting | 1982-09-28 |
| 4268054 | Child transport vehicle | Brent L. Twitchell | 1981-05-19 |
| 4243147 | Three-dimensional lift | Brent L. Twitchell | 1981-01-06 |