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Expired Canadian patentCanada

Resistance wire tension measuring gauge

CA 1318522 C · Owner: Choquet, Pierre · Inventors: Choquet, Pierre

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Measuring either tension load or strain in cables or rods by means of an electrical resistance wire which is mounted along a cable or a rod which can be subject to a tension load or strain. The wire is contained in a wrap around cover which is designed to protect the wire against aggressive agents. The wire is mounted along the cable or rod so that it undergoes a variation of its electrical resistance when the cable or rod is subject to a variation of tension load or strain. A measure of the variation in resistance in the wire determines the tension load or strain in the cables or rods.

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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 June 1, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 1, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 18, 1988
GrantedJune 1, 1993
Term endedJune 1, 2010
Patent numberCA 1318522 C
Classification (IPC)G01L5/10

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedAug 18, 1988Patent grantedJune 1, 1993Term endedJune 1, 2010

Sources & verification

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