2092879

Information

• Patent Grant
• 2092879

• References
• Source

• Patent Number

  2,092,879

• Date Filed

  Not available

• Date Issued

  Tuesday, September 14, 1937
  88 years ago

• CPC

  • H04H20/83 - not sharing the network with any other service

• US Classifications

  • 381 - Electrical audio signal processing systems and devices