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Invention Grant
US827523A Wireless-telegraph system. 失效

  • Patent Title: Wireless-telegraph system.
  • Application No.: US1905290567
    Application Date: 1905-12-06
  • Publication No.: US827523A
    Publication Date: 1906-07-31
  • Inventor: FOREST LEE DE
  • Applicant: FOREST LEE DE
  • Assignee: Lee De Forest
  • Current Assignee: Lee De Forest
  • Priority: US1905290567 1905-12-06
Wireless-telegraph system.
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