Patent classifications
E
FIXED CONSTRUCTIONS
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E04
BUILDING
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E04H
BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
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9/00
Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
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E04H9/14
against other dangerous influences, e.g. tornadoes, floods
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