3439920

Information

• Patent Grant
• 3439920

• References
• Source

• Patent Number

  3,439,920

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1969
  55 years ago

• CPC

  • G11B3/42 - with provision for adaptation or interchange of heads

• US Classifications

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