Method of driving indicator tube
CA 2105111 C · Owner: Amano, Yoshifumi · Inventors: Amano, Yoshifumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of driving an indicator tube comprised of a pair of common memory electrode plates and independent address XY electrode groups separate therefrom comprises the steps of in a case where an address discharge is to be carried out by the XY electrode groups from a state that no wall charge uniformly exists on wall surfaces of the pair of memory electrodes in all cells on a picture screen or on a line to be addressed, holding one of the pair of memory electrodes at a potential higher than a discharge space potential generated by an address discharge in a range such that a discharge is not caused on the low voltage side of the address electrode during an address period, holding the other …
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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 August 30, 1993 and granted April 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2015.
- 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.