US 12,136,326 B2
Systems and methods for radio frequency identification enabled deactivation 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 May 25, 2023, as Appl. No. 18/323,845.
Application 18/323,845 is a continuation of application No. 17/228,241, filed on Apr. 12, 2021, granted, now 11,699,335.
Application 17/228,241 is a continuation of application No. 16/540,026, filed on Aug. 13, 2019, granted, now 11,011,037, issued on May 18, 2021.
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 2023/0298447 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G08B 13/24 (2006.01)
CPC G08B 13/2425 (2013.01) [G08B 13/2411 (2013.01); G08B 13/2417 (2013.01); G08B 13/2448 (2013.01); G08B 13/246 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for operating a marker, comprising:
receiving, by an active radio frequency identification (RFID) element of a marker, an RFID deactivation signal; and
responsive to the RFID deactivation signal, supplying power to a detuner element of the marker so that the detuner element switches from a first state to a second state,
wherein a resonant frequency of a passive Acousto-Magnetic circuit of the marker 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.