US 7,320,433 B2
Marker for coded electronic article identification system
Ryusuke Hasegawa, Morristown, N.J. (US)
Assigned to Metglas, Inc., Conway, S.C. (US)
Filed on Dec. 04, 2006, as Appl. No. 11/607,993.
Application 11/607993 is a continuation in part of application No. 11/095559, filed on Apr. 01, 2005.
Prior Publication US 2007/0080226 A1, Apr. 12, 2007
This patent is subject to a terminal disclaimer.
Int. Cl. G06K 19/06 (2006.01)
U.S. Cl. 235—493  [235/449] 22 Claims
OG exemplary drawing
 
1. A coded marker of a magnetomechanical resonant electronic article identification system, adapted to resonate mechanically at preselected frequencies, comprising: a plurality of ductile magnetostrictive strips cut to predetermined lengths from amorphous ferromagnetic alloy ribbons that have curvatures along a ribbon length direction and exhibit magnetomechanical resonance under alternating magnetic field excitations with a static bias field, the strips having a magnetic anisotropy direction perpendicular to a ribbon axis, wherein each of at least two of the strips resonates at a different preselected frequency.