2139055

Information

• Patent Grant
• 2139055

• References
• Source

• Patent Number

  2,139,055

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1938
  86 years ago

• CPC

  • H03J9/002 - comprising one or more tuning stages separated from the rest of a receiver
  • H03D7/10 - the signals to be mixed being applied between different pairs of electrodes

• US Classifications

  • 455 - Telecommunications
  • 174 - Electricity: conductors and insulators
  • 178 - Telegraphy
  • 331 - Oscillators
  • 333 - Wave transmission lines and networks
  • 334 - Tuners