US1280312A
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Adapter for sheet-metal piping.
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US1291590A
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Downdraft attachment for furnaces or heaters.
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US1224220A
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Furnace.
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US1155761A
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Stack-head or boot for hot-air stacks.
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US1296703A
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Device for locking register-frames in stack-head openings.
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US1192121A
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Boot for hot-air stacks.
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US1160203A
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Package of elbows.
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US1141493A
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Means for securing register-frames to stack-heads.
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US1141492A
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Stack-head for hot-air stacks or conduits.
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US1160202A
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Transversely-bracing and interlocking hot-air stack of rectangular cross-section.
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US1224219A
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Hot-air distributer for furnaces.
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US1102609A
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Safety device for clutch-controlled machines.
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US1102608A
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Safety device for clutch-controlled machines.
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US1175306A
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Hot-air stack.
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US1082175A
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Nest of stovepipe.
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US1085303A
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Double-wall hot-air conveyer or stack.
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US724210A
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Hot-air pipe.
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