| US 7,564,360 B2 | ||
| RF release mechanism for hard tag | ||
| Andre Cote, Williamstown, N.J. (US); and Farrokh Abadi, Villanova, Pa. (US) | ||
| Assigned to Checkpoint Systems, Inc., Thorofare, N.J. (US) | ||
| Filed on Feb. 27, 2007, as Appl. No. 11/679,250. | ||
| Claims priority of provisional application 60/778646, filed on Mar. 03, 2006. | ||
| Prior Publication US 2007/0205902 A1, Sep. 06, 2007 | ||
| Int. Cl. G08B 13/14 (2006.01) | ||
| U.S. Cl. 340—572.9 [340/572.8; 340/572.1] | 53 Claims |
| 1. A security tag for attachment to an article comprising:
a locking mechanism with a release for attaching the tag to the article;
a resonant circuit or an RFID circuit for responding to wireless signal at a predetermined frequency corresponding to said
resonant circuit or to said RFID circuit;
an ambient RF energy harvesting circuit;
a release signal detection circuit coupled to and powered by said ambient RF energy harvesting circuit and
an actuator electrically coupled to said release signal detection circuit, said actuator releasing said locking mechanism
whenever said release signal detection circuit receives a release signal.
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