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:
Aug. 24, 1993
Filed:
Oct. 15, 1991
Applicant:
Inventors:
Brent F Balch, Fort Lauderdale, FL (US);
David Roberson, Forest, VA (US);
Assignee:
Sensormatic Electronics Corporation, Deerfield Beach, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455127 ; 340572 ; 455 41 ; 455121 ;
Abstract
A transmitter for an electronic article surveillance system having a power amplifier for forming a drive signal for causing a current to flow through an antenna. The magnitude of the current flowing through the antenna is sensed and, based upon the sensed current, the drive signal is continuously controlled.