Security tag for compact disc storage container
CA 2091244 A1 · Owner: Piccoli, Anthony F. · Inventors: Piccoli, Anthony F.; Gill, Peter L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A security tag (50) for a compact disc container (10) holding a compact disc (12) is comprised of a generally flat substrate (52) which includes circuitry for establishing a resonant circuit (62). The substrate (52) is positioned within the compact disc storage container (10) such that a first portion of the substrate extends beyond the periphery of the compact disc and a second portion of the substrate overlaps at least a portion of the compact disc. A part of the circuitry (62) is located on each of the first and second portions of the substrate so that the frequency of the resonant circuit (62) is established at least in part by interaction between the circuitry and the compact disc. …
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 May 29, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2013.
- 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.