Elastic surface wave transmitting device for eliminating multiple transit echoes
CA 1070784 A · Owner: Thomson-Csf · Inventors: Coussot, Gerard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An elastic surface wave transmitting device comprising a piezo-electric substrate S1 on which is arranged a transmitting transducer TE placed at the centre of the substrate S1, and two receiving transducers TR1 and TR2 arranged on either side of the transmitting transducer TE means (a, metallic water P1, for example deposited by evaporation on to the substrate Sl) enabling the waves transmitted by the transmitting transducer TE towards each of the receiving transducers TR1 and TR2 to be phase-shifted so that the waves O1 and O2 respectively reflected by these receiving transducers TR1 and TR2 cancel one another out at the transmitting transducer TE.
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 January 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 1997.
- 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.