2489008

Information

• Patent Grant
• 2489008

• References
• Source

• Patent Number

  2,489,008

• Date Filed

  Not available

• Date Issued

  Tuesday, November 22, 1949
  76 years ago

• CPC

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

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 330 - Amplifiers
  • 333 - Wave transmission lines and networks