Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837422 | Multi-user card system | Juergen Dethloff | 1989-06-06 |
| 4833607 | Apparatus and method to control economical systems | Juergen Dethloff | 1989-05-23 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837422 | Multi-user card system | Juergen Dethloff | 1989-06-06 |
| 4833607 | Apparatus and method to control economical systems | Juergen Dethloff | 1989-05-23 |