Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Marking substance and security markings for testing the authenticity of documents

Marking substance and security markings for testing the authenticity of documents

US Patent 7367592 · Granted May 6, 2008

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Layered structure with conductive polymer for recognition of manipulation and pr2018
Optically variable security attribute2007
Method of testing documents provided with optico-diffractively effective marking2007
Security element structure for documents, devices for checking documents with su2006
Method of testing documents provided with optico-diffractively effective marking2006
Security element structure for documents, devices for checking documents with su2006
Security strips2006
Multi-compact-sensor adapted for mounting at an ascending angle1999