System and method for location-dependent message access and telecommunications infrastructure incorporating the same
CA 2309404 A1 · Owner: Williams, Marvin L. · Inventors: Williams, Marvin L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for, and method of, controlling access to a received message. In one embodiment, the system includes: (1) a position comparison circuit that makes a comparison between a position of the system and positional information coupled to the message and (2) a message access controller coupled to the position comparison circuit that controls, access to the message based on an outcome of the comparison.
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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 May 24, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 24, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2022.
- 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.