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Expired Canadian patentCanada

Force measurement with compensation of errors caused by accelerations of measuring apparatus

CA 2018618 C · Owner: Metriguard, Inc. · Inventors: Bechtel, Friend K.

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

A method and apparatus for compensating for errors in the measurement of force applied to a load beam interposed between two compliant supports and a load point involves placement of an accelerometer at a selected location an the load beam. Signals produced by the accelerometer are added to a signal produced by a transducer at one of the compliant supports to obtain a composite signal which is compensated for accelerations of the load beam.

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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

  • Filed June 8, 1990 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 8, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 2012.
  • 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 8, 1990
GrantedSeptember 4, 2001
Term endedJune 8, 2010
Patent numberCA 2018618 C
Classification (IPC)G01L1/00 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJune 8, 1990Patent grantedSep 4, 2001Term endedJune 8, 2010

Sources & verification

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