1801182

Information

• Patent Grant
• 1801182

• References
• Source

• Patent Number

  1,801,182

• Date Filed

  Not available

• Date Issued

  Tuesday, April 14, 1931
  93 years ago

• CPC

  • H04M7/08 - for phantom working
  • G01R31/08 - Locating faults in cables, transmission lines, or networks
  • H01J21/20 - Tubes with more than one discharge path Multiple tubes
  • H04L25/08 - Modifications for reducing interference Modifications for reducing effects due to line faults; Receiver end arrangements for detecting or overcoming line faults
  • H04M3/28 - Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
  • H04M3/30 - for subscriber's lines , for the local loop
  • H01J2893/003 - Tubes with plural electrode systems

• US Classifications

  • 370 - Multiplex communications
  • 324 - Electricity: measuring and testing