Photographic color copying apparatus and exposure control process
CA 1313469 C · Owner: Von Stein, Werner Ritter · Inventors: Kraft, Walter; Von Stein, Werner Ritter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 9-16717/17188/GTP 533/GTP 534, PHOTOGRAPHIC COLOR COPYING APPARATUS AND EXPOSURE CONTROL PROCESS, ABSTRACT OF THE DISCLOSURE Originals to be copied are scanned spectral photometrically by regions and from the spectral values obtained thereby, color extract values adapted to the spectral sensitivity variations of the copy material are formed by electronic or computer filtering. The color extract values are then evaluated for the determination of the necessary amounts of copying light. The spectral values are simultaneously used for image analysis and additional control of the exposure. The process avoids expensive optical filters and makes an image analysis which yields a greater amount …
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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 February 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 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.
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.