Patent classifications
E
FIXED CONSTRUCTIONS
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E04
BUILDING
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E04B
GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
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1/00
Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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E04B1/62
Insulation or other protection; Elements or use of specified material therefor
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E04B1/74
Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
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E04B1/82
specifically with respect to sound only
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E04B1/84
Sound-absorbing elements
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E04B2001/8457
Solid slabs or blocks
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E04B2001/8476
with acoustical cavities, with or without acoustical filling
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E04B2001/848
the cavities opening onto the face of the element
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E04B2001/8495
the openings going through from one face to the other face of the element
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