Halftone printing system
CA 1324026 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Ohnishi, Masaru; Yamada, Keiki; Hatabe, Etsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A halftone printing system according to this invention comprises reference level generation means for generating a reference gradation level decision, means for comparing a gradation level input signal with the output signal from the reference level generation means and deciding if the gradation level input signal is at or above the reference gradation level count, means for counting the number of output dots from the decision means and delivering heat accumulation information on heat accumulated in a thermal head and, a pulse generator which generates the number of pulses or the width of a pulse, corresponding to the gradation level input signal in accordance with the heat accumulation …
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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 November 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 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.