| 摘要 |
A dual-status marker for use in electronic article surveillance systems havi ng an alternating magnetic field within an interrogation zone. The marker comprise s a piece of a high permeability, low coercive force magnetic material substantially coex tensive with a piece of remanently material. The first piece is rectangular and exhibits lengthwise sections at which the material is removed, thus leaving narrow wi dth regions forming switching sections, portions adjacent each end forming flux collecto rs. The marker is densensitized by uniformly magnetizing the piece of unmagnetizable materi al.
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