Automobile radio telephone apparatus capable of detecting a drop of power source voltage
CA 2034712 C · Owner: Komoda, Motoyoshi · Inventors: Komoda, Motoyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automobile radio telephone apparatus capable of detecting a drop of power source voltage to prevent a telephone channel from being occupied wastefully and to thereby enhance efficient use of channels with regard to the operation of an automobile radio telephone system. When the power source voltage is lower than a predetermined voltage, the apparatus informs the user of such an occurrence. On the lapse of a predetermined period of time and if a conversation is under way the apparatus warns, the user that it will execute a forcible conversation ending procedure and then executes it.
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 January 22, 1991 and granted September 27, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 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.