Pittsburgh Paints are manufactured by PPG Industries. Pittsburgh Paints is actually a registered trademark of PPG and is the brand name under which the company sells paints and coatings.
Pittsburgh Paints is the brand name used by PPG Industries to sell its in-house paint formulations, as well as paint formulations from Devoe Paint, a separate brand the company acquired in 2015.
PPG Industries was founded as the Pittsburgh Plate Glass Company, hence the reference to Pittsburgh in the brand name. In the 1900s, the company branched out from plate glass to paint and coatings by acquiring shares in the Patton Paint Company, based out of Wisconsin. As of 2015, PPG Industries manufactures paint in its own company factories.