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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E04F15/02044
Separate elements for fastening to an underlayer
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E04F2015/0205
with load-supporting elongated furring elements between the flooring elements and the underlayer
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E04F2015/02066
with additional fastening elements between furring elements and flooring elements
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E04F2015/02072
the additional fastening elements extending into the back side of the flooring elements
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