Inventor
HARTINGS MICHAEL F
US5 patents
Patents
5 patentsUS4774504ASep 27, 1988
EAS tag with helical coil
MONARCH MARKING SYSTEMS INC56 citations93
US4999641AMar 12, 1991
Magnetic antenna system having independently controllable electrical field shielding and magnetic field balance
MONARCH MARKING SYSTEMS INC23 citations91
US4972198ANov 20, 1990
Multiple loop antenna
MONARCH MARKING SYSTEMS INC37 citations89
US4872018AOct 3, 1989
Multiple loop antenna
MONARCH MARKING SYSTEMS INC49 citations89
US4890115ADec 26, 1989
Magnetic antenna
MONARCH MARKING SYSTEMS INC16 citations71