1923831

Information

• Patent Grant
• 1923831

• References
• Source

• Patent Number

  1,923,831

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1933
  91 years ago

• CPC

  • H04R9/06 - Loudspeakers
  • H04R9/025 - Magnetic circuit
  • H04R2209/043 - Short circuited voice coils driven by induction

• US Classifications

  • 381 - Electrical audio signal processing systems and devices