IC 019. US 001 012 033 050. G & S: Rigid pipes of plastic; junctions for rigid pipes, not of metal
IC 020. US 002 013 022 025 032 050. G & S: Mounting parts for pipelines, not of metal, namely, pipe clips, mounting plates, pipe brackets, pipe clamps, pipe flanges, pipe flange adaptors, and pipe adapters for concealed valves
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