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Expired Canadian patentCanada

Monitoring diagnosis device for electrical appliance

CA 2073385 C · Owner: Tanaka, Hideo · Inventors: Akimoto, Yoshiakira; Tanaka, Hideo; Izui, Yoshio

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 monitoring diagnosis device for an electrical appliance such as gas insulated switchgear includes a sensor such as an acceleration sensor, and a neural network including an input layer, an intermediate layer, and an output layer each, consisting of a plurality of neural elements coupled to the adjacent layer via a plurality of connection weights. The output of the sensor is first processed and then is supplied to the neural elements of the input layer. The connection weights are adjusted by means of learning data such that the output from the neural elements of the output layer of the neural network correctly identifies the causes of abnormality of the electrical appliance.

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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 July 8, 1992 and granted May 5, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2014.
  • 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 8, 1992
GrantedMay 5, 1998
Term endedJuly 8, 2012
Patent numberCA 2073385 C
Classification (IPC)G01R31/00 +2 more

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedJuly 8, 1992Patent grantedMay 5, 1998Term endedJuly 8, 2012

Sources & verification

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