3602570

Information

• Patent Grant
• 3602570

• References
• Source

• Patent Number

  3,602,570

• Date Filed

  Not available

• Date Issued

  Tuesday, August 31, 1971
  53 years ago

• CPC

  • G02B5/32 - Birefringent or phase retarding elements
  • G03H1/00 - Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them Details peculiar thereto
  • G06K9/74 - Arrangements for recognition using optical reference masks
  • G11C13/045 - using photochromic storage elements

• US Classifications

  • 359 - Optical: systems and elements