3894756

Information

• Patent Grant
• 3894756

• References
• Source

• Patent Number

  3,894,756

• Date Filed

  Not available

• Date Issued

  Tuesday, July 15, 1975
  49 years ago

• CPC

  • G03H1/041 - Optical element in the object space affecting the object beam, not otherwise provided for
  • B42D25/328 - Diffraction gratings Holograms
  • B42D25/405 - Marking
  • B42D25/425 - by deformation
  • G03H1/0011 - for security or authentication
  • G03H1/2286 - Particular reconstruction light ; Beam properties
  • G07F7/086 - by passive credit-cards adapted therefor
  • B42D25/318 - Signatures
  • B42D2033/04 - Transparent material
  • B42D2033/10 - Metallic material
  • B42D2033/16 - Magnetic or magnetisable material
  • B42D2033/18 - Reflecting material
  • B42D2033/22 - Perforated or incised material
  • B42D2035/06 - Picture of the user
  • B42D2035/08 - Alphanumerical data
  • B42D2035/20 - Optical effects
  • B42D2035/34 - Markings visible under particular conditions or containing coded information
  • G03H1/0244 - Surface relief holograms
  • G03H2001/0022 - Deciphering being performed with numerical or optical key
  • G03H2001/0428 - Image holography
  • Y10S283/904 - Credit card

• US Classifications

  • 283 - Printed matter
  • 355 - Photocopying
  • 359 - Optical: systems and elements
  • 430 - Radiation imagery chemistry: process, composition, or product thereof