Computer system interface surface
CA 2374723 C · Owner: Lapstun, Paul · Inventors: Silverbrook, Kia; Lapstun, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for enabling user interaction with computer software running in a computer system. The user interaction is via an interface such , as a sheet of paper bearing information relating to the computer software and coded data indicative of an interactive element relating to the computer software. A sensing device is placed in an operative position relative to the interface surface, and senses indicating data indicative of the interactive element. The sensing device also generates movement data indicative of the sensing device's movement relative to the interface surface. The indicating and movement data from the sensing device are received in a computer and 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 May 24, 2000 and granted April 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2022.
- 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.