1917035

Information

• Patent Grant
• 1917035

• References
• Source

• Patent Number

  1,917,035

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1933
  92 years ago

• CPC

  • H04B3/11 - using pilot wire

• US Classifications

  • 381 - Electrical audio signal processing systems and devices