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Expired Canadian patentCanada

Ribbon array optical switch and optical switch architecture utilizing same

CA 2213309 C · Owner: Lucent Technologies Inc. · Inventors: Cohen, Leonard George

CIPO record

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Abstract From the Canadian patent

A ribbon array switch in which an input ribbon array comprising a plurality of input optical fibers can be selectively switched to any one of a plurality of output ribbon arrays mounted on an outer periphery of a switch housing. Preferably a stepper motor is used to rotate the input ribbon array along the outer periphery of the switch housing, the result being that the input optical fibers will be optically connected to corresponding output optical fibers that make up the output ribbon arrays. In another aspect, the invention features an optical switch architecture including a first stage comprising a fiber switch element and second stage comprising a ribbon array switch element described …

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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

  • Filed August 18, 1997 and granted September 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 18, 1997
GrantedSeptember 12, 2000
Term endedAugust 18, 2017
Patent numberCA 2213309 C
Classification (IPC)G02B26/08 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedAug 18, 1997Patent grantedSep 12, 2000Term endedAug 18, 2017

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