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Expired Canadian patentCanada

Binary selector stage and a selector and selector system comprising such selector stages

CA 1210479 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Koomen, Cornelis J.

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Abstract From the Canadian patent

23-, ABSTRACT:, Contemporary communication networks tele-, phony exchanges in particular, are frequently provided with a central control. A consequence thereof is that they are very complex. The invention provides a communication network having a high degree of distributed control and processing by providing a binary selector stage with which selectors and selector systems are assembled which are employed in the entire network. The selector stage comprises an identification circuit (10) for identifying destination addresses applied to input (12) and which are considered to be associated with the service area of the selector stage. An indicator circuit (11) determines 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 August 26, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 10, 1983
GrantedAugust 26, 1986
Term endedAugust 26, 2003
Patent numberCA 1210479 A
Classification (IPC)H04Q3/42 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 10, 1983Patent grantedAug 26, 1986Term endedAug 26, 2003

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.