4. Signals and indicators
  5. Indicators
  6. Gravity type

William C. Lee

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Cellular mobile radiotelephone system using tilted antenna radia

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent

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Cellular telephone system

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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Covert communication system

Pulse or digital communications – Repeaters – Testing
Patent

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Door activity monitoring apparatus

Signals and indicators – Indicators – Gravity type
Patent

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Field component diversity antenna and receiver arrangement

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent

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Profile ID: LFUS-PAI-P-605242

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