The Greene Group has been in continuous operation in Warren, Pennsylvania, since its founding in 1904 by G.G. Greene, Sr. The original line of stamped metal products for farming included a top-selling hame fastener for horses. ... 2790 Pennsylvania Ave. | West Warren, PA 16365 814.723.5700 2600 20th Street | Port Huron, MI 48060 810.982.9720.. "/>