Touch panel system and method for using same
CA 1292297 C · Owner: Zwick, Scott D. · Inventors: Zwick, Scott D.; Person, Herman R.; Veik, Thomas L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The touch panel system of the present invention comprises two light emitters at the upper opposite corners of the cathode screen. The light emitters each emit a light beam which is deflected in an annularly sweeping pattern across the face of the screen. When the beams are interrupted the time in the sweep of the beam, is sensed and this timing is used to calculate the location of the obstruction which interrupted the beam.
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
- Granted November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 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.