Nonmetallic building materials Trademarks Filed in August 18, 1982
HERCULITE K
Filed: August 18, 1982
Glass
Owned by: PPG INDUSTRIES, INC.
Serial Number: 73380618
MAC
Filed: August 18, 1982
Refractory Brick
Owned by: NATIONAL REFRACTORIES & MINERALS CORPORATION
Serial Number: 73380622
