3781109

Information

• Patent Grant
• 3781109

• References
• Source

• Patent Number

  3,781,109

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • G07C9/00055 - visually
  • G03B15/00 - Special procedures for taking photographs Apparatus therefor
  • G03B17/245 - Optical means
  • G03B2217/241 - with means for producing composite exposures
  • G03B2217/243 - Optical devices
  • G03B2217/246 - Details of the markings
  • G03B2217/248 - with means for masking

• US Classifications

  • 355 - Photocopying
  • 356 - Optics: measuring and testing
  • 359 - Optical: systems and elements
  • 396 - Photography