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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5/00
Buildings or groups of buildings for industrial or agricultural purposes
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E04H5/02
Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
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E04H5/04
Transformer houses; Substations or switchgear houses
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