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Invention Grant
US967192A Relay for block-signal systems. 失效
块状信号系统的继电器。

  • Patent Title: Relay for block-signal systems.
  • Patent Title (中): 块状信号系统的继电器。
  • Application No.: US1908419197
    Application Date: 1908-03-04
  • Publication No.: US967192A
    Publication Date: 1910-08-16
  • Inventor: HAWKINS LAURENCE A
  • Applicant: GEN ELECTRIC
  • Assignee: Gen Electric
  • Current Assignee: Gen Electric
  • Priority: US1908419197 1908-03-04
Relay for block-signal systems.
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