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Expired Canadian patentCanada

Linearization circuit

CA 1134465 A · Owner: The Babcock & Wilcox Company · Inventors: Thompson, William 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

A voltage linearization circuit for use with a resistance thermometer device or a thermocouple to produce a nearly linear output signal from a nonlinear input signal. The circuit produces a voltage proportional to the square of the input voltage through the use of operational amplifiers and fieldeffect transistors connected in voltage dividing arrangements, and combines this second order voltage or a reduced magnitude thereof, with the original input voltage to produce a nearly linear output signal.

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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 26, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 15, 1979
GrantedOctober 26, 1982
Term endedOctober 26, 1999
Patent numberCA 1134465 A
Classification (IPC)G01K3/02 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedMay 15, 1979Patent grantedOct 26, 1982Term endedOct 26, 1999

Sources & verification

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