The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2005
Filed:
Jun. 27, 2001
Applicants:
Ralph Kay, Basingstoke, GB;
Brian William Holmes, Middlesex, GB;
Inventors:
Ralph Kay, Basingstoke, GB;
Brian William Holmes, Middlesex, GB;
Assignee:
De La Rue International Limited, Basingstoke, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03H001/00 ;
U.S. Cl.
CPC ...
Abstract
A security device has a substrate formed with a surface relief defining an optically variable effect generating structure. At least two different reflection enhancing materials are provided on, or on the same side of, substrate with respect to the surface relief, whereby the optically variable effect can be viewed against a background defined by the reflection enhancing materials.