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Fuel economizer

Stoves and furnaces – Dampers – Stovepipe
Patent

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Fuel saving device

Stoves and furnaces – Dampers – Stovepipe
Patent

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Furnace with draft-limiter and ventilation

Stoves and furnaces – Dampers – Stovepipe
Patent

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Mechanical draft controller

Stoves and furnaces – Dampers – Stovepipe
Reexamination Certificate

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Mechanical draft controller with vent damper

Stoves and furnaces – Dampers – Stovepipe
Patent

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Method for fuel economy

Stoves and furnaces – Dampers – Stovepipe
Patent

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One piece adjustable damper

Stoves and furnaces – Dampers – Stovepipe
Patent

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Safety stovepipe damper assembly

Stoves and furnaces – Dampers – Stovepipe
Patent

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Self-tapping duct fitting

Stoves and furnaces – Dampers – Stovepipe
Patent

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Sleeve damper apparatus

Stoves and furnaces – Dampers – Stovepipe
Patent

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Valve for furnace stack pipe

Stoves and furnaces – Dampers – Stovepipe
Patent

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Valve for furnace stack pipe

Stoves and furnaces – Dampers – Stovepipe
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