3862799

Information

• Patent Grant
• 3862799

• References
• Source

• Patent Number

  3,862,799

• Date Filed

  Not available

• Date Issued

  Tuesday, January 28, 1975
  50 years ago

• CPC

  • G03B21/325 - Endless cassettes

• US Classifications

  • 351 - Optics: eye examining, vision testing and correcting
  • 352 - Optics: motion pictures
  • 353 - Optics: image projectors
  • 396 - Photography
  • 434 - Education and demonstration