72028021
Apr 12, 1957
May 13, 1958
MECHANICAL PACKINGS MADE OF VARIOUS MATERIALS-NAMELY, [ LEATHER, METALS , ] FIBROUS MATERIALS, [ GRANULAR MATERIALS, ] RUBBER COMPOUNDS, SYNTHETIC RUBBER COMPOUNDS, PLASTICS AND VARIOUS COMBINATIONS THEREOF; GASKETS AND GASKET MATERIALS, INSULATION TAPES, TUBING, SHEETING [ , PUMP CUPS, VALVES, AND DISCS ]
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