| 摘要 |
The invention relates to a marking device (1, 11) for the identification of objects with a coding of regions (4, 5, 13) with different magnetic properties. The marking device is characterized in that magnetic regions (4, 5, 13) are so magnetically biased that their hysteresis loops (7, 8, 15) are shifted on the field strength axis (H) relative to the magnetization axis (M). The invention relates further to a method and an apparatus for producing such a marking device as well as to a method of reading such a marking device.
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