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Electrical interference free projected beam smoke detector
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Access control system having centralized/distributed control
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Integrity securing monitor and method for a security installation
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Self-compensating projected-beam smoke detector
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Self-diagnostic projected-beam smoke detector
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Duct smoke detector
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Integrity securing monitor and method for a security installation
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Control and display system
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Ceiling mountable passive infrared intrusion detection system
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Steerable mirror assembly and cooperative housing for a passive infrared intrusion detection system
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Modular transceiver with adjustable specular member
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