The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2002
Filed:
Jul. 20, 2000
Ezequiel Mejia, Woodbury, MN (US);
Digital Angel Corporation, South St. Paul, MN (US);
Abstract
A remotely testable Passive Integrated Transponder (PIT) tag interrogation system is described. The system comprises a remotely activated test PIT tag fixed within the field of the system antenna By selectively activating the test PIT tag, and determining successful receipt of the test tag identification signal during such activation, remote confirmation of proper operation of the system is achieved. The system also contains components which permit the remote detection of the antenna field by analyzing signals present in the antenna during operation. Remote detection of the natural frequency to which the antenna is tuned is also achieved by analyzing signals present in the antenna during the collapse of the electromagnetic field in the antenna when the antenna drive signal is removed.