Apparatus for changing the status of magnetic markers in an electronic article surveillance system
CA 2240014 C · Owner: Zarembo, Peter J. · Inventors: Sando, Dennis L.; Zarembo, Peter J.; Weber, William R. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present re/desensitizer is an apparatus for changing the status of a magnetic marker of an electronic article surveillance system. The markers are attached to or otherwise associated with an object to be protected such as a , book, CD, etc. The device can be set up as a resensitizer a desensitizer, or , with the inclusion of a mode switch a combination re/desensitizer. The , apparatus includes a magnetic field generator for generating a marker status changing magnetic field, detection means for detecting presence of an object a control means for controlling the activation time of the magnetic field generator such that the marker status changing magnetic field is generated when an …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 8, 1997 and granted November 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.