3856389

Information

• Patent Grant
• 3856389

• References
• Source

• Patent Number

  3,856,389

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1974
  50 years ago

• CPC

  • G03B21/02 - Multiple-film apparatus
  • G03B21/10 - Projectors with built-in or built-on screen
  • G03B31/04 - in which sound track is not on, but is synchronised with, a moving-picture film

• US Classifications

  • 352 - Optics: motion pictures