1327722

Information

• Patent Grant
• 1327722

• References
• Source

• Patent Number

  1,327,722

• Date Filed

  Not available

• Date Issued

  Tuesday, January 13, 1920
  104 years ago

• CPC

  • G11B3/685 - Intermediate mediums
  • Y10S425/81 - Sound record

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus
  • 369 - Dynamic information storage or retrieval
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER