3164679

Information

• Patent Grant
• 3164679

• References
• Source

• Patent Number

  3,164,679

• Date Filed

  Not available

• Date Issued

  Tuesday, January 5, 1965
  59 years ago

• CPC

  • H04M3/40 - Applications of speech amplifiers
  • H04M19/006 - Circuits for increasing the range of current supply source
  • H04Q1/30 - Signalling arrangements Manipulation of signalling currents

• US Classifications

  • 379 - Telephonic communications