1329928

Information

• Patent Grant
• 1329928

• References
• Source

• Patent Number

  1,329,928

• Date Filed

  Not available

• Date Issued

  Tuesday, February 3, 1920
  104 years ago

• CPC

  • G11B3/003 - Devices for transmitting, directing, amplifying sound
  • G11B3/006 - using horns

• US Classifications

  • 369 - Dynamic information storage or retrieval
  • 312 - Supports: cabinet structure
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER