4. Combustion
  5. Timer, programmer, retarder or condition responsive control

Leonard W. Holmes

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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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Multistage warm air furnace with single stage thermostat and...

Stoves and furnaces – Hot-air furnaces – Liquid or gaseous fuel
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2069530

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