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Expired Canadian patentCanada

Qualification system for printed images

CA 1332791 C · Owner: Nally, Robert B. · Inventors: Nally, Robert B.

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 system for automatically determining the quality of various types of printed images uses either a single element optical sensor or a multi-element sensor which may include one or more of an optical magnetic, thermal or acoustic transducer. A microprocessor is used to store a standard set of images in its memory and automatically compares the printed images on a background material with the standard images. The microprocessor then causes the system to produce a result of said comparison. The system has various uses but is particularly useful in the banking business to process cheques.

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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 November 1, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 1, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 15, 1989
GrantedNovember 1, 1994
Term endedNovember 1, 2011
Patent numberCA 1332791 C
Classification (IPC)G06K9/00 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedFeb 15, 1989Patent grantedNov 1, 1994Term endedNov 1, 2011

Sources & verification

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