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Expired Canadian patentCanada

Current source for a variable load with an inductive component

CA 1303675 C · Owner: Pro, John D. · Inventors: Goetzinger, Charles E.; Gelecinskyj, George; Pro, John D.

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 current source for establishng a relatively constant current through widely differing impedances comprising a voltage potential regulator for adjustably regulating a supplied potential to provide a current to a current controller with a current sensing means to supply a signal to the current controller , there being a signal, supplied from the signal controller to control the voltage potential regulator A further current rise time regulator is provided to increase the rise time occurance provided to a commutated load

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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 June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
  • 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 11, 1989
GrantedJune 16, 1992
Term endedJune 16, 2009
Patent numberCA 1303675 C
Classification (IPC)G05F1/56 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMay 11, 1989Patent grantedJune 16, 1992Term endedJune 16, 2009

Sources & verification

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