ThermoSafe

 

ThermoSafe™
"Density Change Copy-Void Pantograph"

U.S. Patent 6,396,927

Protects against digital scanning or copying. The word COPY or VOID appears when photocopied.

ThermoSafe™ - "Density Change Copy/Void Pantograph

ThermoSafe "Density Change Copy-Void Pantograph"