Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5303549 | Counterforce and holding device | Dean M. Valvano | 1994-04-19 |
| 4807518 | Counterbalance mechanism for vertically movable means | John R. Witzel | 1989-02-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5303549 | Counterforce and holding device | Dean M. Valvano | 1994-04-19 |
| 4807518 | Counterbalance mechanism for vertically movable means | John R. Witzel | 1989-02-28 |