2483317

Information

• Patent Grant
• 2483317

• References
• Source

• Patent Number

  2,483,317

• Date Filed

  Not available

• Date Issued

  Tuesday, September 27, 1949
  75 years ago

• CPC

  • H04R21/021 - with granular resistance material

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 181 - Acoustics