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Expired Canadian patentCanada

Illuminator having an easily replaceable light source unit

CA 1304058 C · Owner: Akaishi, Youichi · Inventors: Tateyama, Makoto; Shioiri, Shigeo; Akaishi, Youichi

CIPO record

Overview

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

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Abstract From the Canadian patent

An illuminator includes an illuminator frame having a cut-out portion in which a light source unit is removably positioned. The light source unit includes a cold-lamp light source supported in a plate-like member of the unit's frame. The plate-like member has extended portions which are also plate-like for fitting into guide slits formed in a light source unit supporting member of the illuminator. The supporting member has a retainer which helps hold the plate-like extensions of the plate-like member of the light source unit. The illuminator includes a power supply linked with a connector positioned so that when the light support unit is inserted into the illluminator in its proper …

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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 23, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 25, 1989
GrantedJune 23, 1992
Term endedJune 23, 2009
Patent numberCA 1304058 C
Classification (IPC)F21V19/04 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJan 25, 1989Patent grantedJune 23, 1992Term endedJune 23, 2009

Sources & verification

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