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Expired Canadian patentCanada

High frequency signal driver and method of forming same

CA 1290411 C · Owner: General Electric Company · Inventors: Toda, Minoru

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Abstract From the Canadian patent

A signal processing apparatus and method extend the frequency response of a component whose output decreases past a first frequency. The apparatus responds to a signal having a range of frequencies which is applied to a component transmission line and the component transmission line is coupled to the component. The component transmission line is resonant at a second frequency greater than the first frequency and has a source impedance and an input impedance which are not matched. The source impedance is greater than the impedance of the component. The method comprises providing a signal forming a transmission line which is resonant at the second frequency and coupling the transmission line …

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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 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 25, 1988
GrantedOctober 8, 1991
Term endedOctober 8, 2008
Patent numberCA 1290411 C
Classification (IPC)H01P5/02

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedAug 25, 1988Patent grantedOct 8, 1991Term endedOct 8, 2008

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