| Number | Name | Date | Kind |
|---|---|---|---|
| 5049898 | Arthur et al. | Sep 1991 | |
| 5266968 | Stephenson | Nov 1993 | |
| 5396078 | Klaus et al. | Mar 1995 | |
| 5699091 | Bullock et al. | Dec 1997 | |
| 6027195 | Gauthier et al. | Feb 2000 | |
| 6039430 | Helterline et al. | Mar 2000 |
| Number | Date | Country |
|---|---|---|
| WO9852762 | Nov 1998 | WO |
| Entry |
|---|
| Motorola, “RFID: Everything You Need to Know” 11/11/97, pp. 1-19. |