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Expired Canadian patentCanada

Dual speed sensor pickup assembly

CA 1320845 C · Owner: Dierker, Joseph B. Jr. · Inventors: Peterson, Glen D.; Dierker, Joseph B. Jr.; Gee, Thomas A.

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 dual speed sensor pickup assembly (140) for sensing the rotational velocity of two independently rotatable, closely axially spaced exciter rotors (116 and 118) is provided. The pickup assembly includes two pole piece assemblies (136 and 138) having axes skewed relative to one another but radial relative to the common axes of rotation (24) of the exciter rotors.

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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 August 3, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 3, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 28, 1989
GrantedAugust 3, 1993
Term endedAugust 3, 2010
Patent numberCA 1320845 C
Classification (IPC)G01P3/48 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJuly 28, 1989Patent grantedAug 3, 1993Term endedAug 3, 2010

Sources & verification

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