3820881

Information

• Patent Grant
• 3820881

• References
• Source

• Patent Number

  3,820,881

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • G11B15/34 - through non-skip drive means
  • G03B31/02 - in which sound track is on a moving-picture film

• US Classifications

  • 352 - Optics: motion pictures
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER