2683861

Information

• Patent Grant
• 2683861

• References
• Source

• Patent Number

  2,683,861

• Date Filed

  Not available

• Date Issued

  Tuesday, July 13, 1954
  71 years ago

• CPC

  • H04R19/04 - Microphones
  • H03C3/28 - using variable impedance driven mechanically or acoustically

• US Classifications

  • 332 - Modulators
  • 381 - Electrical audio signal processing systems and devices