Carrier representing value and comprising patterns applied by a
Coded identification card and other standardized documents
Color copy resistant document using irregular outline letters in
Color identification system
Compound film for an identity card with a humanly visible...
Computerized method of generating film masters for embossing and
Copy-invalidating document
Copy-proof sheet
Copy-resistant document
Copyproof document
Counterfeit resistant documents and methods
Counterfeit-proof paper for discouraging attempt at reproduction
Credit and identification cards having pieces of diffraction gra
Currency paper, especially bank note, with a safety design and p