Computer system interface surface with reference points
CA 2374716 C · Owner: Silverbrook Research Pty. Ltd. · 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. A user is provided with an interface surface containing information relating to the computer software and including coded data indicative of an identity of the interface surface and of at least one reference point of the interface surface. The user places a sensing device into an operative position relative to the interface surface. In this opera-tive position, the sensing device senses indicating data indicative of: the identity of the interface surface; and a position of the sens-ing device relative to the interface surface using at least some of , the coded data. The computer …
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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 February 15, 2011. 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.