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Invention Grant
US918969A Insulating-bushing for electrical service-boxes. 失效
电气服务箱绝缘子。

  • Patent Title: Insulating-bushing for electrical service-boxes.
  • Patent Title (中): 电气服务箱绝缘子。
  • Application No.: US1908466964
    Application Date: 1908-12-11
  • Publication No.: US918969A
    Publication Date: 1909-04-20
  • Inventor: COLE ROBERT C
  • Applicant: PRATT JOHNS CO
  • Assignee: Pratt Johns Co
  • Current Assignee: Pratt Johns Co
  • Priority: US1908466964 1908-12-11
Insulating-bushing for electrical service-boxes.
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