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Expired Canadian patentCanada

Piezoelectric bimorph or monomorph bender structure

CA 1108745 A · Owner: Motorola, Inc. · Inventors: Bost, Jonathan R.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A woven mesh of conductively coated stiff filaments is affixed between a first element deformable in response to an applied electronic signal and a second element which has substantially the same configuration as the first element and which may be electrically deformable also. The mesh serves as a center vane between two elements which allows the bender elements to move relative to each other. The bender is supported by peripheral tabs extending from the mesh. A bender structure is produced by coating a woven mesh of conductively coated filaments with an uncured solid epoxy. The mesh and two transducer elements are assembled together and heat and pressure applied to melt and then cure the …

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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

  • Granted September 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 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.
FiledJune 12, 1978
GrantedSeptember 8, 1981
Term endedSeptember 8, 1998
Patent numberCA 1108745 A
Classification (IPC)H04R17/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJune 12, 1978Patent grantedSep 8, 1981Term endedSep 8, 1998

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.