Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5581057 | Elevator car for an open elevator shaft | Alan F. Green | 1996-12-03 |
| 4735295 | Apparatus for generating hoistway data in an elevator | Hans Hochstrasser, Kenneth W. Smith | 1988-04-05 |