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Expired Canadian patentCanada

Automatic weight detecting device

CA 1303072 C · Owner: Ohji, Kenzo · Inventors: Ito, Shuji; Ohji, Kenzo; Inoue, Masanobu

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:, An automatic weight detecting device for use in an electronic oven is provided with a platform on which an object to be measured is placed. A shaft supports the platform and is both rotatable and slidable vertically. A resilient member supports the shaft. A load detecting device converts the weight of the object into an electrical amount, e.g. a capacitance, and a weight detecting circuit integrates the readings to obtain the average of the electrically physical amount while the platform is rotating. The result is improved accuracy and less fluctuation of the instantaneous weight as the platform rotates.

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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 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 12, 1988
GrantedJune 9, 1992
Term endedJune 9, 2009
Patent numberCA 1303072 C
Classification (IPC)G01G21/23 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJuly 12, 1988Patent grantedJune 9, 1992Term endedJune 9, 2009

Sources & verification

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