2371453

Information

• Patent Grant
• 2371453

• References
• Source

• Patent Number

  2,371,453

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1945
  79 years ago

• CPC

  • H04R13/02 - Telephone receivers

• US Classifications

  • 381 - Electrical audio signal processing systems and devices