Electroacoustic sandwich transducer with bonded joints
CA 1103344 A · Owner: Politechnika Wroclawska · Inventors: Gudra, Tadeusz; Ciszewski, Tadeusz H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an electroacoustic sandwich transducer which comprises two metallic blocks with at least one layer of piezo-electric material sandwiched between them. The faces of the said layer are metal sprayed to conduct a signal voltage. One metallic block has at least one projecting element reaching to the opposite metallic block and connected with the opposite block by means of a binding substance. Stresses are generated between the layers of piezo-electric material and the metallic blocks these stresses originating, in the piezo-ceramic material. The contact faces between the metallic blocks can be either slanted or perpendicular relative to the layers of piezo-electric material. The …
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 June 16, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 1998.
- 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.