3842217

Information

• Patent Grant
• 3842217

• References
• Source

• Patent Number

  3,842,217

• Date Filed

  Not available

• Date Issued

  Tuesday, October 15, 1974
  50 years ago

• CPC

  • H04N5/7605 - on discs or drums
  • G11B9/00 - Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00 Record carriers therefor
  • H04N5/903 - using variable electrical capacitive recording

• US Classifications

  • 369 - Dynamic information storage or retrieval
  • 386 - Motion video signal processing for recording or reproducing