Touch panel and method for controlling same
CA 2014111 C · Owner: Vishay Dale Electronics, Inc. · Inventors: Veik, Thomas L.; Person, Herman R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The touch panel of the present invention comprises a plurality of beam emitter-detector pairs disposed around the perimeter of a video display area. The emitters direct energy beams toward the detectors which are located directly opposite across the display area from the emitters. A programmed central processor is connected to the emitters and is programmed to sequentially scan the emitters for actuating the emitters one at a time to create a modulated energy beam which is intermittently turned on and off for predetermined periods of time at a predetermined frequency. The detectors sense the modulated energy beams and create an electrical signal which is fed through a comparator and then to …
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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 April 6, 1990 and granted April 16, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 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.