The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1984
Filed:
Aug. 13, 1981
John A Gregor, Basking Ridge, NJ (US);
Gregory J Sellers, Richmond, VA (US);
Allied Corporation, Morris Township, Morris County, NJ (US);
Abstract
A magnetic theft detection system marker is adapted to generate magnetic fields at frequencies that (1) are harmonically related to an incident magnetic field applied within an interrogation zone and (2) have selected tones that provide the marker with signal identity. The marker is an elongated, ductile strip of amorphous ferromagnetic material having a composition defined by the formula M.sub.a N.sub.b O.sub.c X.sub.d Y.sub.e Z.sub.f, where M is at least one of iron and cobalt, N is nickel, O is at least one of chromium and molybdenum, X is at least one of boron and phosphorous, Y is silicon, Z is carbon, 'a'-'f' are in atom percent, 'a' ranges from about 35-85, 'b' ranges from about 0-45, 'c' ranges from about 0-7, 'd' ranges from about 5-22, 'e' ranges from about 0-15 and 'f' ranges from about 0-2, and the sum of d+e+f ranges from about 15-25.