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Expired Canadian patentCanada

Digital engine analyzer

CA 1269168 C · Owner: Snap-On Tools Corporation · Inventors: Quinn, Robert O.; Govekar, Craig F.; Wisneski, Leonard J. 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

A microprocessor controlled digital engine analyzer receives analog input signals from an engine being analyzed, engine parameter data entered via a keyboard and function data, selecting one of several operating modes for the analyzer and which information is to be displayed entered via the keyboard, and displays on a CRT screen the selected information such as cylinder firing order RPM, Dwell, KV and DC volts, alphanumerically information, such as primary and secondary ignition and voltage alternator and fuel injector information through the use of continuous waveform patterns, and additional information pertaining to Dwell, KV and Cylinder Shorting through the use of bar graphs. The …

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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 May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
  • 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 22, 1986
GrantedMay 15, 1990
Term endedMay 15, 2007
Patent numberCA 1269168 C
Classification (IPC)G09G1/16 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedAug 22, 1986Patent grantedMay 15, 1990Term endedMay 15, 2007

Sources & verification

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