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Invention Grant
US907738A Pole-piece for dynamo-electric machines. 失效

  • Patent Title: Pole-piece for dynamo-electric machines.
  • Application No.: US1901073050
    Application Date: 1901-08-23
  • Publication No.: US907738A
    Publication Date: 1908-12-29
  • Inventor: CHURCHWARD ALEXANDER
  • Applicant: GEN ELECTRIC
  • Assignee: Gen Electric
  • Current Assignee: Gen Electric
  • Priority: US1901073050 1901-08-23
Pole-piece for dynamo-electric machines.
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