Kevin R. Coffey

Magnetomechanical electronic article surveilliance marker with bias element having abrupt deactivation/magnetization characteristic

EAS marker deactivation device having core-wound energized coils

Multiple-use deactivation device for electronic article surveillance markers

Multi-phase mode multiple coil distance deactivator for magnetomechanical eas markers

Apparatus for deactivating magnetomechanical eas markers affixed to magnetic recording medium products

EAS marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element

Magnetostrictive element having optimized bias-field-dependent resonant frequency characteristic

Magnetomechanical electronic article surveillance marker with low-coercivity bias element

AMORPHOUS ALLOY COMPOSITIONS FOR A MAGNETOMECHANICAL RESONATOR AND EAS MARKER CONTAINING SAME

coil apparatus for deactivating a surveillance tag were wound on cores with