4. Radiant energy
  5. Invisible radiant energy responsive electric signalling
  6. Infrared responsive

David C. Bliven

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Alarm and test system for a digital added main line

Telephonic communications – Terminal accessory or auxiliary equipment – With circuit connection to terminal
Patent

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Alarm and test system for a digital added main line

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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Alarm and test system for a digital added main line

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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Apparatus for extracting a gas from a liquid and delivering the

Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Patent

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Digital added main line system

Multiplex communications – Wide area network – Packet switching
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Profile ID: LFUS-PAI-P-325851

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