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FR2990788A1
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Device for protecting physical persons
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CZ2006119A3
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Transceivers and portable receiver - vibrator with multiple control
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AU2524701A
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Multiple-triggering alarm system by transmitters and portable receiver-buzzer
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FR2799565A1
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Portable transceiver and receiver-vibrator which allows, with its vibration system, to discrete and remotely alert more than one person.
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FR2797338A1
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Transmitter-receiver-vibrator with programmable, manual and voice trigger for alerting one or more persons carrying a receiver-vibrator
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