Google Patents Authenticable anti-copy document and method to produce an authenticable anti-copy document with a combined void pantograph and faux watermark security featuresÄownload PDF Info Publication number US8355180B2 US8355180B2 US12/456,712 US45671209A US8355180B2 US 8355180 B2 US8355180 B2 US 8355180B2 US 45671209 A US45671209 A US 45671209A US 8355180 B2 US8355180 B2 US 8355180B2 Authority US United States Prior art keywords document void pantograph faux watermark copy Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US8355180B2 - Authenticable anti-copy document and method to produce an authenticable anti-copy document with a combined void pantograph and faux watermark security features US8355180B2 - Authenticable anti-copy document and method to produce an authenticable anti-copy document with a combined void pantograph and faux watermark security features