Patent classifications
E
FIXED CONSTRUCTIONS
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E04
BUILDING
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E04C
STRUCTURAL ELEMENTS; BUILDING MATERIALS
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2/00
Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
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E04C2/30
characterised by the shape or structure
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E04C2/32
formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
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E04C2/324
with incisions or reliefs in the surface
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