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2-wire optovoltaic loop-powered isolation amplifier with current

Communications: electrical – Condition responsive indicating system – With particular system function
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A.C. powered detecting device with battery backup

Communications: electrical – Condition responsive indicating system – With particular system function
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Abnormality detection method and protection apparatus

Communications: electrical – Condition responsive indicating system – With particular system function
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Access control and security alarm apparatus and method

Communications: electrical – Condition responsive indicating system – With particular system function
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Access control system wireless transmission link test method

Communications: electrical – Condition responsive indicating system – With particular system function
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Acoustic alert communication system with enhanced signal to...

Communications: electrical – Condition responsive indicating system – With particular system function
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Acoustic anti-tampering detector

Communications: electrical – Condition responsive indicating system – With particular system function
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Action control process of security alarm system

Communications: electrical – Condition responsive indicating system – With particular system function
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Active entry delay device

Communications: electrical – Condition responsive indicating system – With particular system function
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Active object identification and data collection

Communications: electrical – Condition responsive indicating system – With particular system function
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Active security system

Communications: electrical – Condition responsive indicating system – With particular system function
Reexamination Certificate

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Active supervision of motion-detection systems

Communications: electrical – Condition responsive indicating system – With particular system function
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Adaptive message display apparatus

Communications: electrical – Condition responsive indicating system – With particular system function
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Address setting means for fire detectors

Communications: electrical – Condition responsive indicating system – With particular system function
Reissue Patent

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Address setting means for fire detectors

Communications: electrical – Condition responsive indicating system – With particular system function
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Addressable devices with interface modules having electrically r

Communications: electrical – Condition responsive indicating system – With particular system function
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Addressable location indicator apparatus and method

Communications: electrical – Condition responsive indicating system – With particular system function
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Adverse condition detector having modulated test signal

Communications: electrical – Condition responsive indicating system – With particular system function
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Alarm alerting method and apparatus

Communications: electrical – Condition responsive indicating system – With particular system function
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Alarm analysis tools method and apparatus

Communications: electrical – Condition responsive indicating system – With particular system function
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