Method for erasing on an electronic writeboard
CA 2268208 C · Owner: Van Ieperen, Taco · Inventors: Van Ieperen, Taco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for erasing writing on an electronic writeboard includes the steps of describing an eraser as a mask and monitoring movement of the eraser over the electronic writeboard. When the mask overlaps with writing on the electronic writeboard erasing of the writing within the mask is performed. The shape of the mask is adjusted to compensate for the speed at which the eraser is moved over the electronic writeboard.
Read the whole patent
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 April 1, 1999 and granted June 14, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2021.
- 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.