Patent №
US 4,650,320
Granted
1987-03-17
Filed 1984
Owner
DE LA RUE SYSTEMS LIMITED 3/5 BURLINGTON GARDENS, LONDON W1A 1DL A BRITISH COMPANY
Lab
—
AI components
2
vision · planning
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
06604962
Luminescent security features in or on documents are detected using a detector comprising a fibre optic light guide arranged to transmit an interrogation beam originating from a source onto a document to be tested; and a housing in which a photo-diode array is mounted to receive luminescence emitted from the document. The photo-diode array is connected to electronic circuitry for discriminating between luminescence due to a security feature and other luminescence emitted by the document and for determining that a security feature has been detected.
AI classification
Ownership
DE LA RUE SYSTEMS LIMITED 3/5 BURLINGTON GARDENS, LONDON W1A 1DL A BRITISH COMPANY
assignment · 42550039
Assignors
CHAPMAN, VICTOR B., POTTER, MICHAEL
On an employer assignment, the assignors are typically the inventors.