发明名称 System to detect mail in a mailbox
摘要 In a first embodiment, the system 10 includes a sensor 12, a transmitter 14 coupled to the sensor 12 and adapted to transmit a signal, a receiver 16 adapted to receive the signal, and a remote indicator 18 coupled to the receiver 16. In a second embodiment, the receivers 16 ' are actually transceivers that can retransmit the signals to a receiver 16 ' of another remote indicator 18 and that cooperatively form a mesh network. This arrangement may be quite useful in certain environments, such as a tall apartment building and a long private street, where multiple users are relatively spread out.
申请公布号 US2005122220(A1) 申请公布日期 2005.06.09
申请号 US20040966051 申请日期 2004.10.14
申请人 STAPLES PETER E. 发明人 STAPLES PETER E.
分类号 A47G29/122;(IPC1-7):G08B13/14 主分类号 A47G29/122
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