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Expired Canadian patentCanada

Measurement system for machine parts

CA 1163386 A · Owner: Federal Products Corporation · Inventors: Clark, Earl S.

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

A display for a measuring instrument comprises an array of liquid crystal display segments forming a scale and a multi-digit numerical display in which each digit position comprises a multi-segment liquid crystal display. An input circuit comprises a transducer which may, be responsive to mechanical electrical or any other form of signal and an analog-to-digital converter to provide digitized input signals. Under the control of a signal processing circuit which may use a microprocessor, the digitized signals are applied to respective decoder/drivers for the scale array and numerical display such that the scale is stepped by one segment for each unit change in the next to least significant …

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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 March 6, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 12, 1981
GrantedMarch 6, 1984
Term endedMarch 6, 2001
Patent numberCA 1163386 A
Classification (IPC)G09G3/18

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedFeb 12, 1981Patent grantedMarch 6, 1984Term endedMarch 6, 2001

Sources & verification

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