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Expired Canadian patentCanada

Apparatus for examining objects

CA 1293051 C · Owner: Filler Protection Developments Limited · Inventors: Martin, Michael Stephen

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Apparatus for examining the shape and/or dimensions of an object wherein an object is fed to a test station on a stepping conveyor, the object is illuminated within the test station and scanned by two linear charge-coupled camera devices acting in mutually perpendicular directions across and along the conveyor. Logic circuitry processes the video signals to provide raw measurement signals fed into a microprocessor for analysing the signals and for providing control signals for a downstream reject mechanism.

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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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 8, 1986
GrantedDecember 10, 1991
Term endedDecember 10, 2008
Patent numberCA 1293051 C
Classification (IPC)G01B11/02 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 8, 1986Patent grantedDec 10, 1991Term endedDec 10, 2008

Sources & verification

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