Patent · US Expired

Marking device

US6609663B1 · kind B1 · utility

1Cited by

6References

6Claims

0Family size

Assignee

Forschungszentrum Jülich GmbH · DE

Inventors

Wolfgang Eberhardt · Lich, DE
Jan Morenzin · Hennef (Sieg), DE

Key dates

Filing date	May 9, 2001
Grant date	Aug 26, 2003
Priority date	—
Expiry date	May 9, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG08B13/2437
WIPO fieldControl
WIPO sectorInstruments

Abstract

The inventive marking device (1) for applying to objects has a magnetic coding with areas of different magnetisation. According to the invention, the coding has at least one magnetic base layer (3) and at least one magnetic coding layer (5) and these are configured in such a way as to produce areas with non-parallel or antiparallel magnetic coupling over the length of the base layer (3) or coding layer (5).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.