Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653056 | Operating apparatus for controlling the operation of a revolving door | — | 1997-08-05 |
| 5647173 | Operating method for the operation of a revolving door | Steffen Strunk | 1997-07-15 |
| 5625266 | Sliding door with a drive motor system and control and regulation for a door driven by an electromechanical motor | — | 1997-04-29 |