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Expired Canadian patentCanada

Method of switching time slots in a tdm-signal and arrangement for performing the method

CA 1248248 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Kessels, Jozef L.W.; Bruekers, Alphons A.M.L.

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Abstract From the Canadian patent

12, ABSTRACT:, The invention relates to a time switching stage for exchanging data words. In switching systems for communication systems the need is sometimes felt for switching what are commonly referred to as multi-slot connections. To enable this, the memory capacity of the time switching stage must be doubled. The invention provides a method and an arrangement with which multi-slot connections are realized without extending the memory capacity. This accomplished by using an appropriate interleaving of a shift register and a memory.

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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 January 3, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 9, 1986
GrantedJanuary 3, 1989
Term endedJanuary 3, 2006
Patent numberCA 1248248 A
Classification (IPC)H04J3/02 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedJuly 9, 1986Patent grantedJan 3, 1989Term endedJan 3, 2006

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