System for transmitting messages to a telephone set through the subscriber's line in a telephone system
CA 1198843 A · Owner: Segre-Amar, Leonello · Inventors: Segre-Amar, Leonello
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
System for transmitting messages to a telephone set through the subscriber's line in a telephone system" ABSTRACT OF THE DISCLOSURE, A message transmitting system incorporated in a telephone system and comprising a device for generating service signals relating to the making of a telephone connection between one telephone set and another telephone set, the system comprising a mixer with two inputs which are connected to the service signal generating device and to a message generating device, respectively the output, of the mixer being connected to the telephone 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
- Granted December 31, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2002.
- 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.