1390963

Information

• Patent Grant
• 1390963

• References
• Source

• Patent Number

  1,390,963

• Date Filed

  Not available

• Date Issued

  Tuesday, September 13, 1921
  103 years ago

• CPC

  • G11B3/50 - Anvils or other supports opposing stylus forces

• US Classifications

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