Inventor
WATKINS HARRY E
US7 patents
Patents
7 patentsUS5103234AApr 7, 1992
Electronic article surveillance system
SENSORMATIC ELECTRONICS CORP74 citations94
US4859991AAug 22, 1989
Electronic article surveillance system employing time domain and/or frequency domain analysis and computerized operation
SENSORMATIC ELECTRONICS CORP81 citations93
US5189397AFeb 23, 1993
Method and apparatus for determining the magnitude of a field in the presence of an interfering field in an EAS system
SENSORMATIC ELECTRONICS CORP28 citations90
US5049857ASep 17, 1991
Multi-mode electronic article surveillance system
SENSORMATIC ELECTRONICS CORP39 citations90
US5327118AJul 5, 1994
EAS system with alternating on/off transmitter operation and loop antenna
SENSORMATIC ELECTRONICS CORP43 citations89
US4975681ADec 4, 1990
Interfering signal rejection circuitry and electronic article surveillance system and method employing same
SENSORMATIC ELECTRONICS CORP13 citations73
US5404147AApr 4, 1995
EAS system loop antenna having three loops of different area
SENSORMATIC ELECTRONICS CORP8 citations71