3678392

Information

• Patent Grant
• 3678392

• References
• Source

• Patent Number

  3,678,392

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • H04Q9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
  • H03J1/18 - Control by auxiliary power
  • H03J5/14 - operated by auxiliary power
  • H04B1/16 - Circuits
  • H04Q9/14 - Calling by using pulses

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 340 - Communications: electrical
  • 455 - Telecommunications