Patents Assigned to Kabushiki Kaisha Sankosah
  • Protective device for communication system
    Patent number: 4313147
    Abstract: A communication system protective device usable for various types of electrical communication lines, said device comprising a compact and simple arrangement of jack boards and protectors whereby an overvoltage or overcurrent induced in an outside line is prevented from being applied to the electrical communication apparatuses arranged on interior wiring to keep them safe from failure.
    Type: Grant
    Filed: October 24, 1979
    Date of Patent: January 26, 1982
    Assignee: Kabushiki Kaisha Sankosah
    Inventors: Susumu Uchida, Shigeo Yamamoto, Tsutomu Wadaki