patentRFID Card with Higher Tag Recognition Rate
patentradio frequency identification card with anti-matal effect
patentapparatus and method for non-contact unlocking of digital doorlock
patentResidential complex integrated control system using RF/ID smart key
patentContactless unlocking device and method of digital door lock
patentRF/ID card with anti-metal effect
patentPersonal information management using sensory information and device therefor
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