Communication system comprising a called receiver and a communication apparatus
CA 2028231 C · Owner: Makita, Hiroshi · Inventors: Makita, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communication system is disclosed having a portable radio called receiver and a communication apparatus for calling this receiver. The portable radio called receiver includes a display and a tone generating circuit. The communication apparatus includes a determination circuit a, control circuit, a voice signal recording device a facsimile, device, a memory, and a data processing circuit. The determination circuit determines whether a signal entered through a telephone line is a facsimile signal or a voice signal. The memory stores display data indicating the reception of an image signal, display data indicating the reception of a voice signal, and telephone number data of the portable …
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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 October 22, 1990 and granted October 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2012.
- 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.