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:
Dec. 26, 1995
Filed:
Mar. 18, 1994
Applicant:
Inventor:
Zoe M Anderson, Chineham, GB;
Assignee:
Thomas De La Rue Limited, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
380-3 ; 380 51 ; 355201 ; 283 93 ; 283 94 ; 283902 ;
Abstract
A copy indicating security device includes at least one symbol defined by a first arrangement of print elements, the or each symbol being provided in a background defined by a second arrangement of print elements. Under normal viewing conditions the security device presents a substantially flat tint to the eye. The first and second arrangements of print elements differ from one another so that on copying the device at least one of the symbols is revealed. The perimeter of the or each symbol is generally irregular.