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Expired Canadian patentCanada

Polyphasic multi-coil device

CA 2487668 C · Owner: Ritchey, Jonathan G. · Inventors: Ritchey, Jonathan G.

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 polyphasic multi-coil generator includes a driveshaft at least first and second rotors rigidly mounted on the driveshaft so as to simultaneously synchronously rotate with rotation of the driveshaft and at least one stator sandwiched between the first and second rotors. The stator has an aperture through which the driveshaft is rotatably journalled. A stator array on the stator has an equally radially spaced-apart array of electrically conductive coils mounted to the stator in a first angular orientation about the driveshaft. The stator array is radially spaced apart about the driveshaft. The rotors and the stator lie in substantially parallel planes. The first and second rotors have …

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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

  • Filed November 1, 2004 and granted March 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2024.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 1, 2004
GrantedMarch 26, 2013
Term endedNovember 1, 2024
Patent numberCA 2487668 C
Classification (IPC)H02K16/00 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedNov 1, 2004Patent grantedMarch 26, 2013Term endedNov 1, 2024

Sources & verification

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