Eas marker with flux concentrators oriented transversely to the elongated magnetic wire
CA 2318213 A1 · Owner: Ho, Wing K. · Inventors: Ho, Wing K.; Coffey, Kevin R.; Morin, Sylvie R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A harmonic-type electronic article surveillance marker (20) includes a thin elongated active element (21) and flux concentrators (22 23) provided at the , ends (24, 25) of the active element. The flux concentrators (22 23) have , magnetic anisotropies that are oriented perpendicular to the length of the active element (21). The orientation of the magnetic anisotropies in the anisotropy field of the flux concentrators (22 23) stabilizes the switching , threshold of the active element (21). The switching threshold level can be controlled by varying parameters such as the angle of the magnetic anisotropies relative to the length of the active element (21) the strength , of the anisotropy …
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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 December 21, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.