Title:
【発明の名称】自己証明証券
Document Type and Number:
Japanese Patent JP2000505738
Kind Code:
A
Abstract:
A secure and/or valuable document, such as a banknote (1), incorporates verification means (11;21;31;41) for verifying a security feature (10;22;32;43) on the same or a different security document when the verification means and the security feature are laid over one another. Examples of verification means comprise optical lenses (11), graphic elements, optical filters (21;31), interference filters or line or dot grids (41). An optical filter may take the form of a colour tinted filter (21) for viewing a security element (22) comprising area printed with metameric inks on the same or a different security document. Another form of optical filter is a first transparent polarising window (31) for verifying a second transparent polarising window (32) on the same or a different security document.
Inventors:
Taylor, John Charles
Hardwick, Bruce Alfred
Wayne Kevin, Jackson
The Entech, Paul
Hibert, Cameron Rex
Hardwick, Bruce Alfred
Wayne Kevin, Jackson
The Entech, Paul
Hibert, Cameron Rex
Application Number:
JP51702398A
Publication Date:
May 16, 2000
Filing Date:
October 08, 1997
Export Citation:
Assignee:
Security Proprietary Limited
International Classes:
B41M3/14; B42D15/00; B42D15/10; B42D25/29; B42D25/342; B44F1/12; G03G21/04; G07D7/12; (IPC1-7): B44F1/12; B41M3/14; B42D15/10
Attorney, Agent or Firm:
Takashi Ishida (4 others)