Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Security document using optical fibers and authentication method

Security document using optical fibers and authentication method

US Patent 4710614 · Granted Dec 1, 1987

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Security element comprising an interference pigment and a nanometric filler2019
Security element comprising a masking structure containing a mixture of nanometr2019
Security thread2017
Security paper2013
Optical structure, in particular for a security document and/or a document of va2013
Security structure including nematic liquid crystals2013
Process for manufacturing a sheet material2013
Security structure, particularly for a security document and/or a valuable docum2011
Device for protecting a hypodermic needle1998
Safety means, paper and document against falsification by chemical agent1986