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Expired Canadian patentCanada

Method and apparatus for locating the boundary of an object

CA 1202115 A · Owner: International Remote Imaging Systems · Inventors: Deforest, Sherman E.

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Abstract From the Canadian patent

20-, Abstract, Method and Apparatus for Locating The Boundary of an Object, An apparatus and method for automatically locating the boundary of an object in a field of view has a raster scan device to generate an electrical image of the field of view. The electrical image is segmented and digitized to form a first representation. The image is then processed by comparing the digitized signal to a pre-set threshold to form a second representation. A converter combines each value of the pixel of the second representation with the values of the adjacent pixels into a single value and stores it in a corresponding location in a third representation. The values of the pixels in the third …

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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 March 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 2003.
  • 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 29, 1983
GrantedMarch 18, 1986
Term endedMarch 18, 2003
Patent numberCA 1202115 A
Classification (IPC)H04N7/18 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedDec 29, 1983Patent grantedMarch 18, 1986Term endedMarch 18, 2003

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