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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E04F15/02
Flooring or floor layers composed of a number of similar elements
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E04F15/04
only of wood; or with a top layer of wood; , e.g. with wooden; or metal; connecting members
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E04F15/045
Layered panels only of wood
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