Transponder system
First Claim
1. A transponder system comprising an interrogating source of H.F. electromagnetic radiation, and a plurality of transponders, wherein each includes a token reader unit to receive a removable token including on board data processing capability, the transponders, or a group of transponders, each being arranged when interrogated to transmit a unique H.F. response modulated by information carried upon the token.
6 Assignments
0 Petitions
Accused Products
Abstract
A transponder system comprising an interrogating source of HF electromagnetic radiation, and a plurality of transponders which each include a token reader unit to receive a removable token, e.g., a smart card, including onboard data processing capability. The transponders, or a group of transponders, are each arranged when interrogated to transmit a unique HF response modulated by information taken upon the token.
19 Citations
9 Claims
- 1. A transponder system comprising an interrogating source of H.F. electromagnetic radiation, and a plurality of transponders, wherein each includes a token reader unit to receive a removable token including on board data processing capability, the transponders, or a group of transponders, each being arranged when interrogated to transmit a unique H.F. response modulated by information carried upon the token.
- 6. A transponder system comprising an interrogating source of H.F. electromagnetic radiation and a plurality of transponders, each transponder including a token reader unit in communication with a removable token including on board data processing capability, said reader unit and token being in communication without physical contact, said transponders or a group thereof each being arranged when interrogated to transmit a unique H.F. response modulated by information carried upon its respective token.
Specification