Acoustic wave transducer device
CA 2271787 A1 · Owner: Nortel Networks Corporation · Inventors: Van Schyndel, Andre John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acoustic wave transceiver device comprising a sheet of material which responds electrically to acoustic waves and a signal processor which processes the voltage signal produced by the sheet is disclosed. The sheet has an irregular shape which depends on a width function. The sheet produces a voltage signal representing the convolution of the acoustic signal information in a received wave and the width function. The signal processor deconvolves the voltage signal using said width function which is stored in its memory. A method of selecting the width function (and therefor the shape) based on the Fourier transform of a mathematical relation with orthogonal properties is also disclosed.
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 May 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2021.
- 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.