Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819221 | Method of determining a time value representing at least a part of the communication time interval of a transponder with a communication device | Christoph Kauer | 2004-11-16 |
| 6819223 | Transponder system with acknowledgements associated with respective transponders | — | 2004-11-16 |
| 6816062 | Data carrier for transmitting different stored status information with different transmission parameters | Josef Preishuber-Pfluegl | 2004-11-09 |
| 6708891 | Data carrier having a communication resonant circuit and having means for changing the resonant frequency of this resonant circuit in either sense | Thomas Burger | 2004-03-23 |