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Expired Canadian patentCanada

Flat coil dynamoelectric device and method for manufacturing the same

CA 1260523 A · Owner: Globe Tool And Engineering Company (The) · Inventors: Dolgas, Patrick A.; Finegold, Hyman B.

CIPO record

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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 flat coil dynamoelectric device is provided herein. It includes a substantially rigid preform having an integral outer frame structure having a central bore, a self-supporting shape, which is substantially symmetrical about a center axis. It also includes an integral inner frame structure having a central bore and which is substantially symmetrical about the center axis located within the central bore of the outer frame structure. The inner frame structure has a self-supporting shape. Plural coils of wire form a complete set of coils for the device the coils being, wound on the frame structures. The coils have sides spanning between the frame structures and end turns extending generally …

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 12, 1985
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1260523 A
Classification (IPC)H02K23/54 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedSep 12, 1985Patent grantedSep 26, 1989Term endedSep 26, 2006

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