3131937

Information

• Patent Grant
• 3131937

• References
• Source

• Patent Number

  3,131,937

• Date Filed

  Not available

• Date Issued

  Tuesday, May 5, 1964
  60 years ago

• CPC

  • G11B25/046 - using stationary discs, or cards provided with a circular recording area
  • G11B5/00 - Recording by magnetisation or demagnetisation of a record carrier Reproducing by magnetic means Record carriers therefor
  • G11B5/80 - Card carriers
  • G11B21/043 - for stationary discs

• US Classifications

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