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Expired Canadian patentCanada

Method and system for generating free curved surface

CA 1293812 C · Owner: Kuragano, Tetsuzo · Inventors: Suzuki, Akira; Sasaki, Nobuo; Kuragano, Tetsuzo

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Abstract From the Canadian patent

A free curved surface generating system and method in which a plurality of cross sectional curves representing cross sectional shapes in an x-y coordinate system are generated, the plurality of cross sectional curves are arranged at desired positions in the x-y-z coordinate system, respectively, and thereafter a curved surface is formed between mutually adjacient cross sectional curves through an interpolation to generate the free curved surface are disclosed. In the free curved surface generating system and method when the, parallel translations and rotations are carried out for the generated cross sectional curves in the x-y-z coordinate system, the parallel translations and rotations are …

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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 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 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.
FiledOctober 25, 1988
GrantedDecember 31, 1991
Term endedDecember 31, 2008
Patent numberCA 1293812 C
Classification (IPC)G06T17/20

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedOct 25, 1988Patent grantedDec 31, 1991Term endedDec 31, 2008

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