Object of value comprising a moiré pattern

Object with an optical effect

One-piece label with integral tear strip

One-piece special service mailing form and return envelope and a

Optially variable surface pattern

Optical device

Optical discs, producing methods and production apparatus of...

Optical discs, producing methods and production apparatus of...

Optical night sky imageer

Optically coded document and method of making same

Optically decodable security document

Optically diffracting security element

Optically scannable answer sheet booklet with sequence bars prin

Optically variable and machine-readable device for use on securi

Optically-based methods and apparatus for performing...

Optically-readable cards

Order handling sheet and method

Organizational apparatus

Original perpetual diary calendar

Overlap check construction or similar business form