Touch panel apparatus
CA 1289216 C · Owner: Tamaru, Hideshi · Inventors: Tamaru, Hideshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A touch panel apparatus which when attached to a, display having a substantially cylindrical display surface, reduces the effects of parallax by having a first set of plural light source - photo-detector pairs provided adjacent the cylindrical display surface for generating and detecting a first set of parallel light beams passing across the cylindrical display surface of the display, a second set of plural light source photo-detector pairs provided adjacent the cylindrical display surface for generating and detecting a second set of parallel light beams passing across the cylindrical display surface of the display wherein the, first and second sets of light beams are non-parallel relative …
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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
- Granted September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
- 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.