> D. L. GEORGE & SONS MANUFACTURING, INC. Pennsylvania Since: 1989 D. L. GEORGE & SONS MANUFACTURING, INC.
> BEAR RIDGE MACHINE & FABRICATION INC. Pennsylvania Since: 1974 BEAR RIDGE MACHINE & FABRICATION INC.
> KUTZNER MANUFACTURING INDUSTRIES, INC. Pennsylvania Since: 2014 KUTZNER MANUFACTURING INDUSTRIES, INC.