1661263

Information

• Patent Grant
• 1661263

• References
• Source

• Patent Number

  1,661,263

• Date Filed

  Not available

• Date Issued

  Tuesday, March 6, 1928
  96 years ago

• CPC

  • H04B3/11 - using pilot wire

• US Classifications

  • 340 - Communications: electrical
  • 073 - Measuring and testing
  • 178 - Telegraphy
  • 236 - Automatic temperature and humidity regulation
  • 333 - Wave transmission lines and networks
  • 338 - Electrical resistors
  • 379 - Telephonic communications