1364964

Information

• Patent Grant
• 1364964

• References
• Source

• Patent Number

  1,364,964

• Date Filed

  Not available

• Date Issued

  Tuesday, January 11, 1921
  104 years ago

• CPC

  • H04B3/36 - Repeater circuits
  • H04B3/42 - Circuits for by-passing of ringing signals
  • H04M3/40 - Applications of speech amplifiers

• US Classifications

  • 379 - Telephonic communications