Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
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F23B
METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
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60/00
Combustion apparatus in which the fuel burns essentially without moving
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F23B60/02
with combustion air supplied through a grate
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