A.G. Trimble Co. 801 McNeilly Rd, Pittsburgh, PA15226 A.G. Trimble is a full service promotional products company serving Allegheny County and the surrounding areas. The…More company is family owned and operated and specializes in printing work for flags and other promotional products. Some past clients have included H. J. Heinz, PNC Bank, Carnegie Mellon University, Verizon and many more. The company offers all types of flags, including American flags, state flags, as well as banners and flagpoles. Check the website for details on products or for a gallery of flags.