Hand held digitizer
CA 2011544 C · Owner: Petryhyrycz, Bohdan M. · Inventors: Petryhyrycz, Bohdan M.; Ciavarella, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digitizer for digitizing a trace on a two-dimensional surface, in which the surface is defined by a longitudinal Y direction and a transverse X direction. The digitizer includes a frame mounted on at least three wheels such that the frame is movable only along the Y direction, a cursor mounted on the frame such that the cursor moves in relation to the frame in the X direction; a rotary optical encoder for determining the direction and amount of movement of at least one of the wheels; a pair of linear optical encoders for determining the direction and amount of movement of the cursor; and electronic circuits, including a microcomputer unit for, receiving information from the optical …
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 March 6, 1990 and granted April 16, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2012.
- 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.