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Expired Canadian patentCanada

Multi-voltage and multi-frequence alternator/generator of modular construction

CA 1111478 A · Owner: Gen-Tech, Inc. · Inventors: Tawse, Ian S.

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

Abstract of the Disclosure An alternator/generator of modular construction in which a plurality of magnets are so arranged on the face (s) of a rotor(s) of disc or flywheel conformity as to interact with axially oriented and aligned pole pieces of magnetic material in order to create a flux field across an air gap. A stator(s) cooperating with the rotor(s) comprises in part the pole pieces referred to in the foregoing, and about which are wound induction coils calculated to produce predictable quantities of electrical energy in a multiplicity of voltages and frequencies either simultaneously or otherwise. * * *

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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 October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 13, 1978
GrantedOctober 27, 1981
Term endedOctober 27, 1998
Patent numberCA 1111478 A
Classification (IPC)H02K21/10 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedOct 13, 1978Patent grantedOct 27, 1981Term endedOct 27, 1998

Sources & verification

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