4. Television
  5. Two-way video and voice communication
  6. User positioning

John R. Berres

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Apparatus for controlling echo in communication systems utilizin

Patent

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Digital voice switch

Patent

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Shaped edge solar cell coverslide

Batteries: thermoelectric and photoelectric – Thermoelectric – Radiation pyrometer
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System for integrated distribution of switched voice and televis

Television – Two-way video and voice communication – User positioning
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System for integrated distribution of switched voice and televis

Multiplex communications – Wide area network – Packet switching
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Profile ID: LFUS-PAI-P-855360

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