2840642

Information

• Patent Grant
• 2840642

• References
• Source

• Patent Number

  2,840,642

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1958
  66 years ago

• CPC

  • G11B19/165 - by closing the cover
  • G11B5/012 - Recording on, or reproducing or erasing from, magnetic discs
  • G11B25/043 - using rotating discs

• US Classifications

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