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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12/00
Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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E04H12/02
Structures made of specified materials
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