1841469

Information

• Patent Grant
• 1841469

• References
• Source

• Patent Number

  1,841,469

• Date Filed

  Not available

• Date Issued

  Tuesday, January 19, 1932
  93 years ago

• CPC

  • H04R13/02 - Telephone receivers

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 036 - Boots, shoes, and leggings