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Personal security system with system wide testing

  • US 5,578,989 A
  • Filed: 02/13/1995
  • Issued: 11/26/1996
  • Est. Priority Date: 12/18/1992
  • Status: Expired due to Term
First Claim
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1. A security system including multiple receivers, said receivers having a monitoring range and monitoring a predetermined frequency;

  • said system comprising;

    a portable transmitter having first and second modes of operation for transmitting at said predetermined frequency, said first mode transmitting an emergency signal and said second mode transmitting a modified signal to indicate a test;

    said receivers together monitoring a geographical area greater than said monitoring range, and having first and second modes of operation, respectively, responding throughout said area to successful receipt of said emergency and modified signals, said receivers in said first mode issuing an alarm signal and in said second mode issuing a test signal.

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