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:
Apr. 30, 1991
Filed:
Aug. 03, 1990
Applicant:
Inventor:
Frank Drucker, Tamarac, FL (US);
Assignee:
Sensormatic Electronics Corporation, Deerfield Beach, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340551 ; 340572 ;
Abstract
A tag for use in a magnetic article surveillance system employs an antenna means responsive to a transmitted magnetic signal and a piezoelectric means responsive to the antenna means for generating an audible acoustic signal. Embodiments are provided responding to unmodulated, amplitude modulated, and frequency modulated magnetic signals.