Nonmetallic building materials Trademarks Filed in March 20, 1936
SUPEROCK
Filed: March 20, 1936
BY-PRODUCTS OF BLAST FURNACES-NAMELY, CRUSHED SLAG FOR USE AS AN AGGREGATE FOR CEMENT OR CONCRETE
Owned by: REPUBLIC STEEL CORPORATION
Serial Number: 71376227
ROCKLATH
Filed: March 20, 1936
PLASTER BOARD
Owned by: UNITED STATES GYPSUM COMPANY
Serial Number: 71376233
