Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10108939 | Payment transaction method and payment transaction system | Rudolf Ritter | 2018-10-23 |
| 7478065 | Payment transaction method and payment transaction system | Rudolf Ritter, Eric Lauper | 2009-01-13 |