Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7889099 | Parking-zone management system | Erwin Braukmann, Tilo Krebs | 2011-02-15 |
| 5298726 | Fare card read-writer which overwrites oldest or invalid data | — | 1994-03-29 |
| 5191195 | Fare card read-writer which overwrites oldest or invalid data | — | 1993-03-02 |
| 4798942 | Easy access ticket transport mechanism | — | 1989-01-17 |
| D292939 | Fare collection ticket transport | — | 1987-11-24 |
| 4605843 | Easy access ticket transport | — | 1986-08-12 |