Patent №
US 6,089,614
Granted
2000-07-18
Filed 1998
Owner
DE LA RUE INTERNATIONAL LIMITED
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
09194943
A security device comprises a substrate (1) having a viewing region (3) which is provided on one side with first indicia (7) and on the other side with second indicia (9) overlying the first indicia. The substrate carries an obscuring material (10) aligned with the second indicia (9) so as to prevent at least the second indicia from being viewed from the one side of the substrate under reflected radiation. The substrate is sufficiently transparent while the obscuring material permits the passage of sufficient transmitted radiation to allow the second indicia (9) to be viewed from the one side of the substrate under transmission conditions.
AI classification
Ownership
DE LA RUE INTERNATIONAL LIMITED
assignment · 97050754
Assignors
HOWLAND, PAUL, DRINKWATER, KENNETH JOHN, HOLMES, BRIAN WILLIAM
On an employer assignment, the assignors are typically the inventors.