3275981

Information

• Patent Grant
• 3275981

• References
• Source

• Patent Number

  3,275,981

• Date Filed

  Not available

• Date Issued

  Tuesday, September 27, 1966
  58 years ago

• CPC

  • G11B5/5591 - across drum tracks
  • E21B47/026 - of penetrated ground layers
  • G11B5/004 - Recording on, or reproducing or erasing from, magnetic drums

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 360 - Dynamic magnetic information storage or retrieval
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER