Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-11-23
1996-10-08
Swarthout, Brent A.
Communications: electrical
Condition responsive indicating system
Specific condition
340568, 340551, G08B 1314
Patent
active
055635830
ABSTRACT:
A radio frequency (RF) multibit tag structure useful for identifying objects of interest is described. An array of thin cantilevers of slightly different lengths produced by differential etching are coated with a soft magnetic material which upon interrogation with an RF magnetic field vibrate at their resonant frequencies in the presence of an appropriate bias or direct current (DC) field. The oscillating magnetic fields generated by the vibrating bars and the stationary DC field can be readily detected by a receiver and processed to determine the code of the tag and thus provide information related to the object.
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Brady Michael J.
Chaudhari Praveen
Gambino Richard J.
Heinrich Harley K.
Moskowitz Paul A.
International Business Machines - Corporation
Lee Benjamin C.
Strunck, Esq. Stephen S.
Swarthout Brent A.
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