Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 7775327 | Method and system for stopping elevators using AC motors driven by static frequency converters | Hans-Josef Mennen | 2010-08-17 | |
| 5704464 | Passenger sensor for an escalator or moving walk | Hermann W. Ahls, Oliver Stoxen, Dietmar Kruger | 1998-01-06 | $20,387,000 |
| 5697485 | Passenger conveyor control system having decentralized inputs and outputs | Hans Erich Engel, Reinhardt Henkel, Dietmar Kruger, Oliver Stoxen | 1997-12-16 | $13,041,000 |
| 5482153 | Operation panel for a passenger conveying device | Hans-Dietrich Riedel | 1996-01-09 | $5,465,000 |
| 5431271 | Indicator for a passenger conveying device | Dietmar Krueger | 1995-07-11 | $3,059,000 |
| 4631467 | Escalator passenger flow control | Dietrich E. Herrmann | 1986-12-23 | $11,049,000 |