IC 009. US 021 023 026 036 038. G & S: Fire-extinguishing apparatus, namely fire extinguishers; sheaths, bushing, sleeves, and cuffs, and insulating sheaths, bushing, sleeves, and cuffs for electric cables, electricity conduits for enclosing electric cables

IC 017. US 001 005 012 013 035 050. G & S: Fire-resistant sealing plugs made primarily of rubber; sealing material, namely, gaskets, packings, sheaths, bushing, sleeves, and cuffs made primarily of rubber designed to prevent the propagation of fire, fluid, or gas along cable and pipe lines or ducts; sealing rings, namely, rings of rubber for use as pipe connection seals, and sealing muffs, made of rubber designed to prevent the propagation of fire, fluid, or gas along cable and pipe lines or ducts; flexible pipes not of metal

IC 019. US 001 012 033 050. G & S: Refractory materials, namely, mineral wool for use in buildings, and non-metallic fireproof bricks, blocks, concrete, and concrete building elements; non-metallic cable ducts not for electric circuitry; non-metallic pipes used for building construction