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George Billam
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Individual
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Individual
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635. Billam, G. Jan. 10. Drawings to Specification. Air, drawing off, methods of.-The space under the floor of a room is connected by a channel with a flat nozzle placed immediately in front of the fire or in the chimney.
GB190300635D1903-01-101903-01-10Draught Producer for Fires, Chimneys, and for Ventilating Purposes
ExpiredGB190300635A
(en)