Optical digitizer
CA 1297553 C · Owner: Sato, Yoichi · Inventors: Ichinokawa, Kazuo; Sato, Yoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel digitizer operable on an optical digitization basis comprises a transparent flat plate as a light active surface located on a graphic data recording medium, and a cursor functioning as an optical recognition device movable on the transparent flat plate. A predetermined coordinate correlative pattern is described on or in the transparent flat plate with a fluorescent paint. The cursor comprises a positioning arm provided on the outer periphery thereof to visually trace a data location on the recording medium in accordance with a movement of the cursor to effect positioning of the cursor with respect to the data location, an optical system including a light source, an optical filter …
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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 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.