Switching network
CA 1267711 C · Owner: Rees, Frederick H. · Inventors: Rees, Frederick H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
F.H. Rees 31, SWITCHING NETWORK, Abstract of the Disclosure A telephone exchange, now often called a switch includes a switching network of the space division type which switches PCM highways, and includes a number of sub-networks (SEG1, SEG2 ... SEGN) each of which is a plural (e.g. three) stage array. When a call is to be set up it is set up via one of these sub-networks and a, reserve path chosen for it through a different sub-network. The identity of this reserve path is noted in memory for use if the path via which the connection is actually set up fails. If that happens the call is switched to the reserve path. This facility can also be used for "block transfers" of all calls in a …
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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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.