Communication transmission installation
CA 1054692 A · Owner: Hasler Ag · Inventors: Hafner, Emanuel; Nenadal, Zdenek
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communication-transmission installation in which all subscriber stations, and several switching stations are, connected in series in a ring-main transmitting signals in one direction of circulation, in which parallel-line sections parallel with the ring-main are each connected to two switching stations, and in which each switching station contains a change-over switch, controlled by a fault detector for, switching over between a ring-main section and a parallelline section, characterized in that the direction of transmission in the parallel-line sections corresponds to the direction of circulation in the ring; and in that connected to each switching station is an incoming parallel-line …
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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
- Granted May 15, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 1996.
- 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.