Patent classifications
A
HUMAN NECESSITIES
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A62
LIFE-SAVING; FIRE-FIGHTING
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A62C
FIRE-FIGHTING
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99/00
Subject matter not provided for in other groups of this subclass
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A62C99/0009
Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
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A62C99/0018
using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
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