IC 017. US 001 005 012 013 035 050. G & S: Rings of rubber for use as water-tight pipe connection seals; washers of rubber or vulcanized fiber; insulating tape and band; pipe gaskets; non-metal gaskets for plumbing use; flexible pipes, not of metal; pipe jackets, not of metal for use with plumbing pipes; joint packing for plumbing pipes; water conduits installations in the nature of plastic conduit for plumbing use; plastic washers for water taps
IC 019. US 001 012 033 050. G & S: Water-pipes, not of metal; drain pipes, not of metal made of plastic; rigid pipes, not of metal for building, junctions, not of metal, for water pipes
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