Soundproofing and noise reducing building and construction materials and elements, namely, Non-metal doors, gates, and windows; unprocessed and semi-processed materials not adapted for any specific use, included in this class, namely, pitch, tar, bitumen and asphalt, stone, rock, clay and minerals in the nature of quartz, marble, granite, soapstone and limestone, shaped timber and artificial timber; non-metal suspended ceiling systems comprising panels; slabs, not of metal, for building; port...