3684975

Information

• Patent Grant
• 3684975

• References
• Source

• Patent Number

  3,684,975

• Date Filed

  Not available

• Date Issued

  Tuesday, August 15, 1972
  52 years ago

• CPC

  • H04B3/16 - characterised by the negative-impedance network used

• US Classifications

  • 330 - Amplifiers
  • 340 - Communications: electrical
  • 379 - Telephonic communications