1931598

Information

• Patent Grant
• 1931598

• References
• Source

• Patent Number

  1,931,598

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1933
  91 years ago

• CPC

  • H04B3/11 - using pilot wire

• US Classifications

  • 333 - Wave transmission lines and networks
  • 324 - Electricity: measuring and testing