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Expired Canadian patentCanada

Sensor integrator system

CA 1203306 B · Owner: Miles Laboratories, Inc. · Inventors: White, James A.

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 sensor-integrator utilizes a light sensing diode directly connected to the inputs of an operational amplifier. The operational amplifier forms part of a dual-slope integrator and directly integrates the current generated by the light sensing diode thereby eliminating the need for preamplifiers and diode switching circuitry.

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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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 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.
FiledJune 20, 1980
GrantedDecember 7, 1982
Term endedDecember 7, 1999
Patent numberCA 1203306 B
Classification (IPC)G06G7/18 +2 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedJune 20, 1980Patent grantedDec 7, 1982Term endedDec 7, 1999

Sources & verification

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