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Expired Canadian patentCanada

Minimization of directed points generated in three-dimensional dividing cubes method

CA 1315902 C · Owner: Crawford, Carl Ross · Inventors: Crawford, Carl Ross

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure, A system for displaying three-dimensional surface structures according to computer graphics methods extracts a surface definition from a tomographic array of data using interpolation of the data for smooth high resolution images. Interpolation can be performed to a degree where artifact-free images are produced for all viewing orientations. Data-processing capacity and time requirements can be reduced with less interpolation while image quality is maintained for all viewing orientations by inspecting the viewing orientation and appropriately scaling the image.

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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 April 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 3, 1988
GrantedApril 6, 1993
Term endedApril 6, 2010
Patent numberCA 1315902 C
Classification (IPC)G06T17/00

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 3, 1988Patent grantedApril 6, 1993Term endedApril 6, 2010

Sources & verification

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