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Battery-operated receiver for wireless audible indication system

Communications: electrical – Systems – In and out indicators
Patent

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Decorative motion detector

Communications: electrical – Systems – In and out indicators
Reexamination Certificate

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Direction indicator circuit

Communications: electrical – Systems – In and out indicators
Patent

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Display and control device for homes, apartments, and other buil

Communications: electrical – Systems – In and out indicators
Patent

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Do not disturb doorbell

Communications: electrical – Systems – In and out indicators
Patent

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Exit sign self-testing system

Communications: electrical – Systems – In and out indicators
Patent

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Key storage and monitoring system

Communications: electrical – Systems – In and out indicators
Patent

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Pet operable door chime

Communications: electrical – Systems – In and out indicators
Patent

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Programmable push button

Communications: electrical – Systems – In and out indicators
Reexamination Certificate

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Systems and methods for community tagging

Communications: electrical – Systems – In and out indicators
Reexamination Certificate

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Visitor sensing device

Communications: electrical – Systems – In and out indicators
Patent

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