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Expired Canadian patentCanada

Device for the control of data flows

CA 1080317 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Kessels, Jozef L.W.; Jansen, Pierre G.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to a commutatinn device for the selective control of data transport. There are two data inputs and two data outputs, each of the latter comprising a buffer for storing, for example, each time a data word. A number of possibilities of data transport can thus be selectively controlled i.e. four for a single connection and two different ones for pair-wise connection. There are also provided, for example, seven input control lines i.e. two lines for receiving a signal which indicates whether information is present on the associated input line, two lines for indicating the selected output buffer, two erase lines for making a data buffer freely accessible after output of …

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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 June 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJune 24, 1980
Term endedJune 24, 1997
Patent numberCA 1080317 A
Classification (IPC)H04Q9/00 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJune 24, 1980Term endedJune 24, 1997

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