4. Automatic temperature and humidity regulation
  5. Hot-air furnace
  6. Air and fire control

James T. Vershaw

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Furnace heat exchanger

Heat exchange – Conduit within – or conforming to – panel or wall structure – Opposed plates or shells
Patent

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Gas furnace with variable speed draft inducer

Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Reexamination Certificate

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Gas furnace with variable speed draft inducer

Combustion – Timer – programmer – retarder or condition responsive control
Reexamination Certificate

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Integrated furnace control

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

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Pivotal and removable door for an air handler

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Access opening through portion of casing or cover
Reexamination Certificate

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Profile ID: LFUS-PAI-P-508862

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