Cordless telephone system
CA 2014634 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Shimanuki, Masanobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cordless telephone system comprising a master set, a slave set, and a charger includes terminals for connecting the slave set and the charger so that communication of speech signals and control signals can be conducted. The charger includes an automatic answering circuit incorporated therein. When the automatic answering circuit receives a control signal indicative of a cell incoming through the terminals from the slave set, this circuit executes an automatic answering service such as a service to reproduce an answering message to transmit the reproduced answering message to the slave set through the terminals thereafter to record a message from a person on the other side of the line …
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 April 17, 1990 and granted March 22, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.