4. Telephonic communications
  5. Telephone line or system combined with diverse electrical...
  6. To produce visual-graphic copy

Neptune Water Meter Company

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Compound liquid flow meter

Measuring and testing – Volume or rate of flow – System
Patent

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Compound liquid flow meter with fast crossover characteristic

Measuring and testing – Volume or rate of flow – System
Patent

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Data transmitting apparatus

Telegraphy – Systems – Alternating or pulsating current
Patent

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Frequency responsive apparatus for reading a meter over a teleph

Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy
Patent

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Profile ID: LFUS-PAI-P-908428

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