Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6496220 | Method and arrangement for driving door installations as a function of the presence of persons | Martin Bichsel | 2002-12-17 |
| 6084367 | Method of operating a door system and a door system operating by this method | — | 2000-07-04 |