MAGNETIC PARTICLES, SUBSTRATE COMPRISING SUCH PARTICLES, SECURITY DOCUMENT AND METHOD FOR DETECTING SUCH PARTICLES

A method for detecting the presence of magnetic elongated particles in a substrate the base material of which has magnetic properties substantially differing from the corresponding magnetic properties of the elongated particles. The elongated particles have such a long and thin form that their demag...

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Bibliographische Detailangaben
Hauptverfasser:	DOUBLET, PIERRE, FISHER, JOHN, ROBERTSON, PAUL ANDREW, BURRELL, JONATHAN
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BOOK COVERS BOOKBINDING CALCULATING CHECKING-DEVICES COIN-FREED OR LIKE APPARATUS COMPUTING COUNTING DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR ELECTRICITY FILES HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING HANDLING RECORD CARRIERS INDUCTANCES LOOSE LEAVES MAGNETS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MOVABLE-STRIP WRITING OR READING APPARATUS PERFORMING OPERATIONS PHYSICS PRESENTATION OF DATA PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR RECOGNITION OF DATA RECORD CARRIERS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SPECIAL PRINTED MATTER TESTING TRANSFORMERS TRANSPORTING
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