Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6725202 | Transaction accounting of toll transactions in transponder systems | Francis B. Frazee | 2004-04-20 |
| 6317721 | Transaction accounting of toll transactions in transponder systems | Francis B. Frazee | 2001-11-13 |
| 5809142 | Method and system for calculating a user account balance in a recognition system | Francis B. Frazee | 1998-09-15 |
| 5686920 | Transponder maintenance mode method | Francis B. Frazee | 1997-11-11 |
| 5621412 | Multi-stage transponder wake-up, method and structure | Claude A. Sharpe, Mark Allen Hamlett | 1997-04-15 |
| 5602919 | Speedup for monetary transactions using a transponder in conjunction with a smartcard | Anne Tip, Peter Wolfart | 1997-02-11 |
| 5525994 | Transponder interface circuit | Guenther Froschermeier | 1996-06-11 |
| 5488376 | Transponder interface circuit | Guenther Froschermeier | 1996-01-30 |
| 5471212 | Multi-stage transponder wake-up, method and structure | Claude A. Sharpe, Mark Allen Hamlett, Guenther Froschermeier | 1995-11-28 |
| 5450087 | Transponder maintenance mode method | Francis B. Frazee | 1995-09-12 |