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专利名称：Security device and alarm system发明人：Dorothy L. Hammond申请号：US10915863申请日：20040811公开号：US06980100B1公开日：20051227
专利附图：
摘要：A security device and alarm system includes a reader preferably concealed in afabric article, at least one tag, and an alarm unit. The reader includes a reader
transmitter, reader receiver, CPU, power source, and power switch. The tag includes a tagtransmitter and a tag receiver. If using active RFID tags, each tag includes a power source.
The alarm unit includes an alarm receiver, alarm, and power source. If the reader receiverdoes not receive an appropriate reply from the tag transmitter after the reader
transmitter sends a query to the tag receiver, or if the reader was deactivated, the readertransmitter sends an alarm signal to the alarm unit. Upon the alarm receiver's receipt ofthe alarm signal, the alarm is energized. If using multiple active RFID tags, the CPU checksfor each through tag transmission identifiers, and the alarm identifies the missing tagthrough unique alarm signals.
申请人：Dorothy L. Hammond
地址：P.O. Box 21295 Wichita KS 67208 US
国籍：US
代理人：Dale J. Ream
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