Marine asset security and tracking (MAST) system

Communications: electrical – Condition responsive indicating system – Specific condition

Reexamination Certificate

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Details

C340S572100, C340S539260

Reexamination Certificate

active

07394381

ABSTRACT:
Methods and apparatus are described for marine asset security and tracking (MAST). A method includes transmitting identification data, location data and environmental state sensor data from a radio frequency tag. An apparatus includes a radio frequency tag that transmits identification data, location data and environmental state sensor data. Another method includes transmitting identification data and location data from a radio frequency tag using hybrid spread-spectrum modulation. Another apparatus includes a radio frequency tag that transmits both identification data and location data using hybrid spread-spectrum modulation.

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