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:
Jul. 24, 2012
Filed:
Sep. 30, 2008
Timothy Collins, Homer Glen, IL (US);
Andreas Schaller, Wiesbaden, DE;
Benjamin Bekritsky, Hollis, NY (US);
Theodore Hockey, Mount Airy, MD (US);
Timothy Collins, Homer Glen, IL (US);
Andreas Schaller, Wiesbaden, DE;
Benjamin Bekritsky, Hollis, NY (US);
Theodore Hockey, Mount Airy, MD (US);
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
An apparatus system, and techniques for detecting temperature change are disclosed. The system includes a temperature sensitive antenna that can be included in an RFID tag device. The antenna is associated with a temperature sensitive material that, upon being exposed to a particular temperature level over a time interval, causes at least one of a change in the resonance frequency of the antenna and change in antenna signal strength (e.g., antenna gain). An RFID reader is also provided that sends commands to the tag device and determines the existence of a temperature change based on a comparison of signal strengths received on different frequencies from the antenna.