3778137

Information

• Patent Grant
• 3778137

• References
• Source

• Patent Number

  3,778,137

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1973
  51 years ago

• CPC

  • G03B21/325 - Endless cassettes
  • G03B31/02 - in which sound track is on a moving-picture film

• US Classifications

  • 352 - Optics: motion pictures
  • 242 - Winding, tensioning, or guiding