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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E04C2/44
characterised by the purpose
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E04C2/52
with special adaptations for auxiliary purposes, e.g. serving for locating conduits
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E04C2/521
serving for locating conduits; for ventilating, heating or cooling
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E04C2/525
for heating or cooling
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