3771255

Information

• Patent Grant
• 3771255

• References
• Source

• Patent Number

  3,771,255

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1973
  51 years ago

• CPC

  • G09B5/067 - Combinations of audio and projected visual presentation
  • G03B21/10 - Projectors with built-in or built-on screen
  • G03B23/105 - disc carriers
  • G03B31/06 - in which sound track is associated with successively-shown still pictures
  • G11B3/001 - with vibrating mechanical coupling means between pick-up element and sound producing element
  • 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