US 11,699,335 B2
Systems and methods for Radio Frequency Identification enabled deactiviation of Acousto-Magnetic ferrite based marker
Adam S. Bergman, Boca Raton, FL (US); Manuel Soto, Lake Worth, FL (US); and Ronald B. Easter, Parkland, FL (US)
Assigned to Sensormatic Electronics, LLC, Boca Raton, FL (US)
Filed by Sensormatic Electronics, LLC, Boca Raton, FL (US)
Filed on Apr. 12, 2021, as Appl. No. 17/228,241.
Application 17/228,241 is a continuation of application No. 16/540,026, filed on Aug. 13, 2019, granted, now 11,011,037.
Application 16/540,026 is a continuation of application No. 15/912,190, filed on Mar. 5, 2018, granted, now 10,380,857, issued on Aug. 13, 2019.
Prior Publication US 2021/0233372 A1, Jul. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G08B 13/24 (2006.01)
CPC G08B 13/2425 (2013.01) [G08B 13/246 (2013.01); G08B 13/2411 (2013.01); G08B 13/2417 (2013.01); G08B 13/2448 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for operating a marker, comprising:
receiving, by an active (radio frequency identification) RFID element, a RFID deactivation signal transmitted from an external device; and
responsive to the RFID deactivation signal, supplying power from the active RFID element to a detuner element so that the detuner element switches from a first state to a second state, the detuner element electrically coupled between the active RFID element and a passive Acousto-Magnetic circuit of the marker,
wherein the active RFID element is separate from the passive Acousto-Magnetic circuit, and a resonant frequency of the passive Acousto-Magnetic circuit is changed to a first value outside of an operating frequency range when the detuner element switches from the first state to the second state.