4. Communications: electrical
  5. Continuously variable indicating
  6. Condition responsive

John M. Fruhwald

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4-20 milliampere transmitter

Communications: electrical – Continuously variable indicating – Condition responsive
Patent

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Controlled-potential bias circuit for electrochemical cells

Chemistry: electrical and wave energy – Apparatus – Electrolytic
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Receiver and decoder

Communications: electrical – Digital comparator systems
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Trimode gas detection instrument

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
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Profile ID: LFUS-PAI-P-827632

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