Character reader
CA 2002549 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Yamamoto, Takaharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A character reader includes a digitizer having a tablet on which characters are manually written with a stylus pen. The digitizer outputs position data on a contact position of the stylus pen with the tablet when the character is written on the tablet. A non-contact period during which the stylus pen is detached from the tablet is counted in response to the position data supplied thereto from the digitizer. The non-contact period thus obtained is compared with an identification period and a one character input completion signal is generated when the non-contact period is longer than the identification period. Movement loci of the stylus pen are obtained based on the position data. The …
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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 November 8, 1989 and granted March 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2011.
- 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.