4. Communications: electrical
  5. Condition responsive indicating system
  6. Specific condition

E. Keith Howell

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Humidifier control system

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Piano humidistat

Automatic temperature and humidity regulation – Humidity control
Reexamination Certificate

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Remotely switchable residential circuit breaker

Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent

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Profile ID: LFUS-PAI-P-436442

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