3521294

Information

• Patent Grant
• 3521294

• References
• Source

• Patent Number

  3,521,294

• Date Filed

  Not available

• Date Issued

  Tuesday, July 21, 1970
  55 years ago

• CPC

  • G11B11/105 - using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical
  • G03G19/00 - Processes using magnetic patterns Apparatus therefor
  • G11B5/66 - consisting of several layers
  • G11B11/10591 - for improving write-in properties
  • H04N5/7805 - Recording or playback not using inductive heads
  • G11B5/02 - Recording, reproducing, or erasing methods Read, write or erase circuits therefor
  • G11B2005/0021 - Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal

• US Classifications

  • 360 - Dynamic magnetic information storage or retrieval
  • 386 - Motion video signal processing for recording or reproducing
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER