Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4825593 | Device for actuating a tip-up or sectional door | — | 1989-05-02 |
| 4821592 | Ball cage for a worm-and-nut type drive unit | — | 1989-04-18 |
| 4819743 | Electromechanical operating device for a slidingly movable door | Georges Charnay | 1989-04-11 |