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US Patent 8138921 Reliable tag deactivation

Patent 8138921 was granted and assigned to Kovio on March, 2012 by the United States Patent and Trademark Office.

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Patent
Patent
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Patent attributes

Current Assignee
Kovio
Kovio
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
81389210
Patent Inventor Names
James Montague Cleeves0
Vivek Subramanian0
Date of Patent
March 20, 2012
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Patent Application Number
121890370
Date Filed
August 8, 2008
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Patent Primary Examiner
‌
John A. Tweel, Jr.
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Patent abstract

A method for reliable deactivation of a security (EAS) tag, and an apparatus for accomplishing the same. The method generally includes placing a security tag a first distance from a deactivation apparatus; determining whether a deactivation confirmation signal has occurred; and when it is determined that the deactivation confirmation signal did not occur, placing the security tag closer to the deactivation apparatus. The deactivation apparatus generally includes a pad configured to transmit a deactivation pulse having a power sufficient to deactivate the security tag when it is within a deactivation field; a tag reader configured to detect a signal transmission from an active tag when it is in a read field of the deactivation apparatus; a confirmation indicator configured to indicate that the pad has sent the deactivation pulse; and logic configured to determine when an active tag is in the deactivation field or the read field, and communicate to the confirmation indicator that the pad has sent the deactivation pulse.

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