3913857

Information

• Patent Grant
• 3913857

• References
• Source

• Patent Number

  3,913,857

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1975
  49 years ago

• CPC

  • G03B21/325 - Endless cassettes

• US Classifications

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