Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5912446 | Card reader with carriage powered by movement of inserted card | Yiu Kong Wong, David Henry Groves | 1999-06-15 |
| 5613680 | Game card and system of authorizing game card | David Henry Groves, John R. Spence, Virna A. Uliana | 1997-03-25 |
| 5559317 | Card reader with carriage powered by movement of inserted card | Yiu Kong Wong, David Henry Groves | 1996-09-24 |
| 5493613 | Combination pin pad and terminal | Rodney Grant Denno, Charles R. Sutton | 1996-02-20 |