Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method for checking authenticity of a hologram and a reading device for the performance of the method

Method for checking authenticity of a hologram and a reading device for the performance of the method

US Patent 5943131 · Granted Aug 24, 1999

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Display apparatus for superimposing a virtual image into the field of vision of 2021
Document with hologram, and method of producing same2018
Method for the production of a multi-color volume hologram, a document with such2015
Method and device for producing contact copies2014
Method and apparatus for the production of volume transmission and/or reflection2013
Security system, particularly for valuable documents2011
Method for production of documents with a hologram and a document with a hologra2011
Security system, especially for security documents2010
Security system, particularly for valuable documents2008
Rain sensor, especially for a motor vehicle2006
Rain sensor, in particular for a motor vehicle2005
Device for evaluating diffractive authenticity features2004