Alumina Shale Brick Co. Bradford
Auburn Shale Brick Co. Auburn
Bloomsburg Brick Co. Bloomsburg
Beaver Clay Mfg. Co. New Galilee
Bradford Pressed Brick Co. Bradford
Darlington Brick & Mining Co. Darlington
Darlington Clay Products Co. Darlington
Fallston Fire Clay Co. Pittsburgh
Ferro Brick Co. Watsontown
Gloninger & Co. Pittsburgh
Hydraulic-Press Brick Co. Du Bois
Hydraulic-Press Brick Co. Philadelphia
Kane Brick & Tile Co. St. Marys
Keystone Clay Products Co. Greensburg
Kittanning Brick & Fire Clay Co. Pittsburgh
Kittanning Clay Mfg. Co. Kittanning
Kittanning Clay Products Co. Bradford
Kushequa Brick Co. Kushequa
Latrobe Brick Co. Latrobe
Mill Hall Brick Works Lock Haven
Milton Brick Co. Milton
Penn Brick Corporation Bradford
Pittsburgh-Callery Brick Co. Pittsburgh
Ridgway Brick Co. Watsontown
Rochester Clay Products Co. Rochester
Stuempfle's Sons, David Williamsport
Vanport Brick Co. Pittsburgh
Walker Brick Co., Hay Pittsburgh
Walkers Mills Stone & Brick Co. Pittsburgh
Watsontown Brick Co. Watsontown
Williamsgrove Brick Co. Bigler
Wynn & Starr Co. Trafford
Yingling-Martin Brick Co. Pittsburgh