Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5479754 | Method and apparatus for installing an elevator shaft door | Klaus Betzin | 1996-01-02 |
| 5293962 | Fireproof shaft door for elevators | — | 1994-03-15 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5479754 | Method and apparatus for installing an elevator shaft door | Klaus Betzin | 1996-01-02 |
| 5293962 | Fireproof shaft door for elevators | — | 1994-03-15 |