3671886

Information

• Patent Grant
• 3671886

• References
• Source

• Patent Number

  3,671,886

• Date Filed

  Not available

• Date Issued

  Tuesday, June 20, 1972
  52 years ago

• CPC

  • H04L25/20 - Repeater circuits Relay circuits
  • H03G1/0064 - Variable capacitance diodes
  • H03G3/3036 - in high-frequency amplifiers or in frequency-changers
  • H04B3/06 - by the transmitted signal
  • H04R2225/43 - Signal processing in hearing aids to enhance the speech intelligibility

• US Classifications

  • 333 - Wave transmission lines and networks
  • 178 - Telegraphy
  • 330 - Amplifiers
  • 375 - Pulse or digital communications