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Expired Canadian patentCanada

Simulated lights for an airfield model

CA 1069689 A · Owner: Singer Company (The) · Inventors: Gdovin, David P.; Lusk, Frank J.

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

A light at an aircraft landing site is simulated on a model board by the protruding output end of a precision cut optical fiber This fiber, is secured within a counterbore of a counterbored hole in the model board The length of the precision cut fiber and the depth of the counterbore are closely controlled to ensure that the output end of the fiber protrudes a desired distance. The input end of the precision cut fiber is optically coupled to a collimated light source by a second optical fiber extending through the smaller diameter bore of the counterbored hole.

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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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 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—
GrantedJanuary 15, 1980
Term endedJanuary 15, 1997
Patent numberCA 1069689 A
Classification (IPC)G09B9/08 +2 more

Sources & verification

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