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Expired Canadian patentCanada

Electronic thermometer

CA 1049289 A · Owner: Johnson And Johnson · Inventors: Turner, Robert B. (Jr.)

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An electronic thermometer system comprising a temperature sensing circuit for providing an analog signal representative of the temperature being sensed a voltage to, rate converter circuit responsive to the analog signal for providing uniform digital pulses at a repetition rate proportional to the temperature being sensed and means for count-, ing the digital pulses for a predetermined period of time for providing an indication of the temperature being sensed.

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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 February 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 27, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 27, 1979
Term endedFebruary 27, 1996
Patent numberCA 1049289 A
Classification (IPC)G01K7/02

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedFeb 27, 1979Term endedFeb 27, 1996

Sources & verification

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