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Title:
SECURITY DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/119247
Kind Code:
A3
Abstract:
A security device is disclosed having a region of piezochromic material (102) and an integrated relief structure (103). The security device is arranged such that when a stress is generated in the piezochromic material and relief structure, an optical effect is generated in the piezochromic material.

Inventors:
WHITEMAN ROBERT (GB)
EASTELL CHRISTOPHER JOHN (GB)
Application Number:
PCT/GB2010/000746
Publication Date:
April 21, 2011
Filing Date:
April 13, 2010
Export Citation:
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Assignee:
RUE DE INT LTD (GB)
WHITEMAN ROBERT (GB)
EASTELL CHRISTOPHER JOHN (GB)
International Classes:
B42D15/00; B42D15/10; G02B1/00
Domestic Patent References:
WO2008017869A12008-02-14
Foreign References:
DE102006051524A12008-04-30
EP2003623A12008-12-17
FR2698390A11994-05-27
Attorney, Agent or Firm:
GILL JENNINGS & EVERY LLP (20 Primrose Street, London EC2A 2ES, GB)
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