2149727

Information

• Patent Grant
• 2149727

• References
• Source

• Patent Number

  2,149,727

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1939
  85 years ago

• CPC

  • H03G7/008 - Control by a pilot signal

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 330 - Amplifiers
  • 333 - Wave transmission lines and networks
  • 369 - Dynamic information storage or retrieval