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Expired Canadian patentCanada

Fiberscope

CA 1236441 A · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Tsuno, Koichi; Ono, Kimizo

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

A fiberscope in which the cross-sectional area is maximized of a passage conveying a clear liquid through which an image of an object to be observed can be transmitted, taking into consideration constraints upon diameters of various optical fibers and a surrounding flexible tube. An image transmitting fiber is bundled together with at least one, light guiding fibers which supply illuminating light. The bundled fibers are loosely fitted within a surrounding flexible tube with a space therebetween. A cap member is provided at the end of the flexible tube and optical fiber bundle for maintaining the optical fiber bundle centered at the end of the flexible tube and for directing flows of the …

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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 May 10, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 13, 1983
GrantedMay 10, 1988
Term endedMay 10, 2005
Patent numberCA 1236441 A
Classification (IPC)A61B1/06 +2 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedDec 13, 1983Patent grantedMay 10, 1988Term endedMay 10, 2005

Sources & verification

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