Patent classifications
E
FIXED CONSTRUCTIONS
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E04
BUILDING
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E04F
FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
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2290/00
Specially adapted covering, lining or flooring elements not otherwise provided for
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E04F2290/04
for insulation or surface protection, e.g. against noise, impact or fire
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E04F2290/043
with a bottom layer for sound insulation
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