Electronic article surveillance antenna for attachment to a vertical structure
CA 2449476 A1 · Owner: Coulson, Paul G. · Inventors: Clucas, Robert; Fernandez, Gilbert; Valade, Franklin H. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acousto-magnetic electronic article surveillance antenna (1) is provided that attaches directly to a vertical structure (2) with the electromagnetic field (9) projected across an opening (10) such as an exit or entrance to a , building or other defined area. The vertical structure could be a doorframe or wall, constructed from a wide variety of materials including metal, wood, glass, concrete or gypsum wallboard. The antenna geometry (14 15) is , elongated vertically to allow a corresponding decrease in width projected from the vertical structure, thereby reducing the apparent size of the antenna and providing a near-concealed appearance and protection from physical damage.
Read the whole patent
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 June 14, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2024.
- 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
Timeline From CIPO dates
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.