Identification card having a hologram superimposed on printed data
System and method for providing a security check on a credit card
Multilayer identification card
Method and apparatus for storing and reading authenticating information
ApplicationNo. 561191 filed on 11/21/1995
US Classes:359/2, Authentication235/380, Credit or identification card systems235/451, Capacitive235/457, Holographic235/492, Conductive340/5.8, Authentication (e.g., identity)342/51Radar transponder only
ExaminersPrimary: Dzierzynski, Paul M.
Assistant: Schuberg, Darren
Attorney, Agent or Firm
Foreign Patent References
International ClassL03H 001/00
AbstractSecurity devices which are difficult to reproduce include a grid screen metallization pattern. The grid screen metallization pattern may be laid down over a hologram or diffraction grating formed as a surface relief pattern on a substrate, to form a visually identifiable, semi-transparent security device. Additionally, the metallization pattern may include resonant structures in which information about the security device is encoded. In some embodiments of these security devices, the metallization pattern is disposed in accurate registration with the underlying hologram or diffraction grating. These security devices are made by methods which include printing an oil pattern on the substrate. Areas on which oil is deposited do not receive metal during a metallization step. Since these methods do not use caustics, metallization patterns including features which would otherwise trap and hold caustics are possible.