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Automobile mileage notification system.
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Apparatus and method for communicating with an asset monitoring device via text message
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Expandable, modular communications apparatus with wireless interchangeable device authentication
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Mass occupant emergency notification system using satellite radio downlink
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Locator beacon system having global communication capability
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Global emergency alert notification system
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Combination service request and satellite radio system
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Two-way distress alert and emergency location apparatus and method
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Asset location tracking system
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