non-metal seals for pipe connections, namely, a protection Apparatus for Safety Relief Valves; non-metal fittings for pipes being protection Apparatus for Safety Relief Valves

extruded lead for use as a sealant in waterproofing of masonry joints

CLOSURE FOR EXHAUST PIPES AND VERTICAL EXHAUST STACKS, WHICH ARE COMMONLY ATTACHED TO INTERNAL COMBUSTION ENGINES

SHEATHING AND INSULATING PAPER USED PRIMARILY FOR BUILDING PURPOSES