4. Communications: electrical
  5. Condition responsive indicating system
  6. With particular system function

Robert A. Freliech

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Contact monitor-annunciator

Communications: electrical – Condition responsive indicating system – With particular system function
Patent

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Furnace having a normally closed blower relay

Automatic temperature and humidity regulation – Hot-air furnace – Air and fire control
Patent

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Safety connection for a retrofit flue damper

Automatic temperature and humidity regulation – Miscellaneous – Burner controls with automatic cutoff
Patent

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Profile ID: LFUS-PAI-P-140145

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