4. Multiplex communications
  5. Communication over free space
  6. Repeater

XM Satellite Radio Inc.

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Antenna diversity system

Multiplex communications – Communication over free space – Repeater
Reexamination Certificate

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Apparatus and method for transferring DC power and RF energy...

Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate

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Apparatus for and method of securely downloading and...

Cryptography – Communication system using cryptography – Wireless communication
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Automatic on/off switch for vehicle power outlets

Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
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Combination linearly polarized and quadrifilar antenna

Communications: radio wave antennas – Antennas – Plural separate diverse type
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