Patent classifications
E
FIXED CONSTRUCTIONS
Load children
E04
BUILDING
Load children
E04H
BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
Load children
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
Load children Filter patents View analytics View as hierarchy
E04H9/04
against air-raid or other war-like actions
Load children Filter patents View analytics View as hierarchy
E04H9/06
Structures arranged in or forming part of buildings
Load children Filter patents View analytics View as hierarchy
E04H9/08
Structures arranged underneath buildings, e.g. air-raid shelters
Filter patents View analytics View as hierarchy