3883146

Information

• Patent Grant
• 3883146

• References
• Source

• Patent Number

  3,883,146

• Date Filed

  Not available

• Date Issued

  Tuesday, May 13, 1975
  49 years ago

• CPC

  • G11B33/06 - combined with other apparatus having a different main function
  • G09B5/062 - Combinations of audio and printed presentations
  • G09B21/002 - Writing aids for blind persons
  • G11B3/40 - Driving of heads relatively to stationary record carriers for transducing

• US Classifications

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