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Expired Canadian patentCanada

Measurement of force/velocity characteristic

CA 1088646 A · Owner: Koni B.V. · Inventors: Ellington, Kenneth L.

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

Abstract of the Disclosure:, A hydraulic shock absorber incorporates a piezoelectric pressure sensor and an electromagnetic velocity sensor coupled to an integrated circuit to measure the force/velocity characteristic of the shock absorber. When the characteristic falls outside predetermined values, the circuit delivers an electrical output to an electro-chemical color change cell to indicate failure of the shock absorbers. - 1 -

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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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 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.
FiledOctober 18, 1977
GrantedOctober 28, 1980
Term endedOctober 28, 1997
Patent numberCA 1088646 A
Classification (IPC)G01M17/04 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedOct 18, 1977Patent grantedOct 28, 1980Term endedOct 28, 1997

Sources & verification

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