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Frame support for sliding printed circuit boards
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Test apparatus and method for security system
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Relay supervision system
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Relay supervision system
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Switch monitoring arrangement with remote adjustment capability having debounce circuitry for accurate state determination
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System for detecting irregular operation of switch state verification circuit
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Selective clearing of latched circuits
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Security system with enhanced protection against compromising
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Sequential and/or random polling system with virtually instantaneous response time
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Unitary alarm sensor and communication package for security alarm system
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Data communication system with key data bit denoting significance of other data bits
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Supervision system for monitoring the condition of a battery and a series-connected fuse
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Bidirectional, interactive fire detection system
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System for displaying time-related occurrence of alarm-type events
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Supervision system for monitoring the integrity of a transmission line
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CA1178678A
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Bidirectional, interactive fire detection system
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Bidirectional, interactive fire detection system
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Bidirectional, interactive fire detection system
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Intrusion detection system
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Piezoelectric seismic sensor for intrusion detection
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