3838402

Information

• Patent Grant
• 3838402

• References
• Source

• Patent Number

  3,838,402

• Date Filed

  Not available

• Date Issued

  Tuesday, September 24, 1974
  50 years ago

• CPC

  • G11C17/005 - with a storage element common to a large number of data
  • G01C21/22 - Plotting boards
  • G03B17/245 - Optical means
  • G06K17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of the preceding main groups
  • G11B7/005 - Reproducing
  • G11B7/08 - Disposition or mounting of heads or light sources relatively to record carriers
  • G11B7/1356 - Double or multiple prisms
  • G11B7/1381 - Non-lens elements for altering the properties of the beam
  • G11B7/14 - specially adapted to record on, or to reproduce from, more than one track simultaneously
  • G11C13/048 - using other optical storage elements
  • G03B2217/243 - Optical devices
  • G03B2217/246 - Details of the markings

• US Classifications

  • 365 - Static information storage and retrieval
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER