Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D318357 | Escalator handrail housing | Willy Adrian | 1991-07-16 |
| D298375 | Pair of escalator control boxes | Rido Busse | 1988-11-01 |
| D296374 | Pair of escalator control boxes | Rido Busse | 1988-06-21 |
| 4631467 | Escalator passenger flow control | Detlev Abraham | 1986-12-23 |