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:
Aug. 10, 2010
Filed:
Feb. 27, 2006
Jakob Ehrensvard, Stockholm, SE;
Fredrik Einberg, Huddige, SE;
Jakob Ehrensvard, Stockholm, SE;
Fredrik Einberg, Huddige, SE;
Cypak AB, Stockholm, SE;
Abstract
A tape seal includes electronic circuitry to detect tamper- and manipulation events relating to sealed items in various embodiments. A complex impedance is formed in a continuous seal. The seal is designed in such a way, that any attempt to break or remove the seal results in a change of the complex impedance. An electronic module in connection with the seal quantifies a complex impedance, and when a change is detected above a programmed threshold, this is treated as a tamper event. In one embodiment, the inclusion of reference impedances are applied to allow a more precise detection of a tamper event and allow for automatic calibration of natural variations of the complex impedance. In a further embodiment, a method of determining tampering with a sealed item is disclosed.