1901033

Information

• Patent Grant
• 1901033

• References
• Source

• Patent Number

  1,901,033

• Date Filed

  Not available

• Date Issued

  Tuesday, March 14, 1933
  92 years ago

• CPC

  • G11B20/04 - Direct recording or reproducing
  • G11B7/003 - with webs , filaments or wires
  • G11B7/12 - Heads
  • G11B7/1381 - Non-lens elements for altering the properties of the beam
  • G11B2007/13727 - Compound lenses, i.e. two or more lenses co-operating to perform a function

• US Classifications

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