1954966

Information

• Patent Grant
• 1954966

• References
• Source

• Patent Number

  1,954,966

• Date Filed

  Not available

• Date Issued

  Tuesday, April 17, 1934
  90 years ago

• CPC

  • H04R9/18 - Resonant transducers

• US Classifications

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