Piezoelectric transducers
CA 1067993 A · Owner: Plessey Handel Und Investments Ag · Inventors: Garner, Geoffrey M.; Sear, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
OF DISCLOSURE:, A piezoelectric transducer including a member composed of at least two superposed plastics layers at least one of which is piezoelectric the said at, least one piezoelectric layer being sandwiched in an untensioned state between two electrically conducting electrodes; and support means for the said member which are adapted to form at least one transducer element from the said member. - 1 -
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 December 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 11, 1996.
- 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.