Adaptive paging signal in cordless telephone
CA 2296987 C · Owner: Cannon, Joseph M. · Inventors: Johanson, James A.; Cannon, Joseph M.; Mooney, Philip D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In one embodiment, a cordless telephone according to the invention includes a base unit including a paging mechanism, and a handset including an alerting mechanism responsive to the paging mechanism. At least one of the base unit and the handset includes a page adjusting mechanism to affect an alerting signal output from the alerting mechanism based on a condition. Thus the paging signal is adaptive to increase the opportunity for a user to determine the location of a misplaced handset. In another embodiment a cordless telephone is equipped so that the base unit can provide an indication related to a distance between the base unit and the handset. In yet another embodiment a cordless …
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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 18, 2000 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 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
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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.