3687531

Information

• Patent Grant
• 3687531

• References
• Source

• Patent Number

  3,687,531

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1972
  52 years ago

• CPC

  • G03B21/325 - Endless cassettes

• US Classifications

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