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Expired Canadian patentCanada

Apparatus for treating athlete's foot

CA 1253922 A · Owner: Shibuya Kogyo Co. Ltd. · Inventors: Nakai, Kimimoto; Umezaki, Isao

CIPO record

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Abstract From the Canadian patent

A laser-applied treatment apparatus includes a TEA type laser unit and a flexible link such as a, multi-joint arm assembly, for leading a laser beam emitted from the laser unit to a desired location such, as a part of a person's skin which is affected by dermatophysis, in any desired orientation. Also provided is a pair of convex and concave lenses in the optical path of the apparatus for narrowing and collimating the laser beam such that it has an energy density suitable for use in treatment, e.g. athlete's foot. In one embodiment, a hand switch is mounted on a hand piece portion of the flexible link and it controls the operation of the laser unit. Also provided is a foot switch which is …

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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 9, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 9, 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.
FiledDecember 20, 1985
GrantedMay 9, 1989
Term endedMay 9, 2006
Patent numberCA 1253922 A
Classification (IPC)A61N5/06 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedDec 20, 1985Patent grantedMay 9, 1989Term endedMay 9, 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.