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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2203/00
Specially structured or shaped covering, lining or flooring elements not otherwise provided for
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E04F2203/02
having particular shapes, other than square or rectangular, e.g. triangular, hexagonal, circular, irregular
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E04F2203/023
having triangular shapes
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