| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | EPO (European Patent Office) | 4 | |
| #3 | WIPO (World Intellectual Property Organization) | 3 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | IT methods for management | |
| #3 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Coin-freed | |
| #2 | Ticket-issuing devices | |
| #3 | Data processing systems | |
| #4 | Advertising |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duenhaupt Rolf | 11 |
| #2 | Storck Bruno | 9 |
| Publication | Filing date | Title |
|---|---|---|
| WO0103073A1 | Flexible charge collection system | |
| EP0802513A2 | Device for charging road tolls | |
| DE19654847A1 | Device for making transactions in electronic payments |