Refractory products, articles and materials, namely, monolithic non-metal castings for use as sections of coke walls, refractory bricks not of metal, refractory shapes not of metal and refractory walls comprising modular interlocking bricks, refractory shapes not of metal and refractory construction materials not of metal, all not for use with and excluding furnace wall membranes where steel tubes are joined together with steel strips to form a gas tight enclosure

engineering, construction drafting, and design for others in the field of exterior free-standing and pier-supported wall structures erected for control and containment of radiated energy, such as noise, radio waves, light, wind, engine wake and nuclear radiation

WALL PARTITIONS AND COMPONENTS THEREFOR SOLD AS A UNIT

MASONRY WALLS AND PARTITIONS-NAMELY, BLOCKS AND BINDERS FOR CONSTRUCTING SAID WALLS AND PARTITIONS