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Expired Canadian patentCanada

Linear detection system

CA 1093162 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Towle, Allistair

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

PH 25,102, ABSTRACT, A modulated radio carrier wave detector circuit having high linearity is achieved by incorporating a negative feedback amplifier in the detector load circuit in a manner such that the feedback impedance of the amplifier constitutes the main load circuit of the detector and further the load circuit incorporates at least one linearity compensating diode. Both high linearity and gain, if desired, are possible with the use of this circuit.

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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 January 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 6, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 13, 1976
GrantedJanuary 6, 1981
Term endedJanuary 6, 1998
Patent numberCA 1093162 A
Classification (IPC)H03D1/06

Timeline

Timeline From CIPO dates

19771980198319861989199219951998Application filedDec 13, 1976Patent grantedJan 6, 1981Term endedJan 6, 1998

Sources & verification

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