COLOUR CODING SYSTEM FOR IDENTIFYING OBJECTS

Title:

COLOUR CODING SYSTEM FOR IDENTIFYING OBJECTS

Document Type and Number:

WIPO Patent Application WO2002078964

Kind Code:

A3

Abstract:

The invention relates to a colour coding system for identifying objects, especially valuable documents. Said system comprises coloured particles which reflect in the visual spectral region and disperse at any angle. Said particles are so small that they are not visible to the naked eye, but can be identified by means of a magnifying glass or a microscope. Furthermore, these particles are present in such a low concentration that the colour coding is not detected by the naked eye as being the colour of the product.

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Inventors:

SCHNEIDER WALTER (DE)

Application Number:

PCT/EP2002/003400

Publication Date:

May 01, 2003

Filing Date:

March 26, 2002

Export Citation:

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Assignee:

GIESECKE & DEVRIENT GMBH (DE)
SCHNEIDER WALTER (DE)

International Classes:

B42D15/00; B42D25/00; B42D25/29; D21H21/44; D21H21/28; D21H21/52; (IPC1-7): D21H21/44; D21H21/28

Domestic Patent References:

WO2001000928A1

2001-01-04

Foreign References:

US4863783A

1989-09-05

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