Acoustic touch position sensor using higher order horizontally polarized shear wave propagation
CA 2214119 C · Owner: Elo Touchsystems, Inc. · Inventors: Kent, Joel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acoustic wave touch position sensor in which a transducer (14) coupled to a substrate (10) imparts a surface acoustic wave into the substrate (10) for , propagation along a first axis. A reflecive array (28 34, 30, 36) having , selective reflection characteristics for various wave propagation modes is disposed along the first axis to create a higher order horizontally polarized shear wave having an order greater than zero perpendicular to the axis so , that a touch surface (40) of the substrate (10) is imparted with shear wave energy. This energy may be partially absorbed attenuated or perturbed by an , object touching the substrate (10) to create a modified waveform having a …
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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 February 13, 1996 and granted October 10, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 2018.
- 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
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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.