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Invention Grant
US2172731A Electric switch manipulating means 失效

  • Patent Title: Electric switch manipulating means
  • Application No.: US16606937
    Application Date: 1937-09-28
  • Publication No.: US2172731A
    Publication Date: 1939-09-12
  • Priority: CH221710T 1939-10-18; FR860345T 1939-09-21; GB2720139 1939-10-04; US16606937 1937-09-28
  • Main IPC: H01H23/14
  • IPC: H01H23/14
Electric switch manipulating means
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