3813684

Information

• Patent Grant
• 3813684

• References
• Source

• Patent Number

  3,813,684

• Date Filed

  Not available

• Date Issued

  Tuesday, May 28, 1974
  50 years ago

• CPC

  • G03D13/046 - Drums; Films convolutely fixed on the side of the drum
  • G03D13/14 - for holding films in spaced convolutions

• US Classifications

  • 396 - Photography
  • 242 - Winding, tensioning, or guiding