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US2149486A Method and arrangement for signaling over alternating current networks 失效
交流网络信令的方法和布置

  • Patent Title: Method and arrangement for signaling over alternating current networks
  • Patent Title (中): 交流网络信令的方法和布置
  • Application No.: US75680934
    Application Date: 1934-12-10
  • Publication No.: US2149486A
    Publication Date: 1939-03-07
  • Inventor: ARLE YTTERBERG
  • Applicant: ASEA AB
  • Assignee: Asea Ab
  • Current Assignee: Asea Ab
  • Priority: SE2149486X 1933-12-11
  • Main IPC: H02J13/00
  • IPC: H02J13/00
Method and arrangement for signaling over alternating current networks
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