Method and apparatus for generating display figures with three degrees of freedom
CA 2011825 C · Owner: Clark, Joseph D. · Inventors: Weingartner, Thomas A.; Clark, Joseph D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus and method for providing x, y and z values so as to construct figures from unit vectors rotated in three space wherein the x, y and z values result from processing construction and rotation parameters according to the following relationships: .DELTA.X' = .DELTA. X COS (Gz) + .DELTA.Y SIN (Gz) .DELTA.Y' = - .DELTA. X SIN (Gz) + .DELTA.Y COS (Gz) .DELTA.Z' = .DELTA. Z, where, .DELTA.X = COS (Rz) COS (Ry + Gy) .DELTA.Y = COS (Rz) SIN (Ry + Gy) SIN (Gx) - SIN (Rz) COS (Gx) .DELTA.Z = COS (Rz) SIN (Ry + Gy) COS (GX) + SIN (Rz) SIN (GX) X = X + .DELTA.X', Y = Y + .DELTA.Y', Z = Z + .DELTA.Z' and, Rz, and Ry are construction rotation parameters for the Z and Y axes, respectively, and Gy, …
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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
- Filed March 9, 1990 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.