3687536

Information

• Patent Grant
• 3687536

• References
• Source

• Patent Number

  3,687,536

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1972
  53 years ago

• CPC

  • G03B21/02 - Multiple-film apparatus

• US Classifications

  • 353 - Optics: image projectors
  • 242 - Winding, tensioning, or guiding