P&W was established in Hartford, Connecticut by Frederick Rentschler in July, 1925. The Pratt and Whitney Tool Company provided startup money, factory space, and the name for the new company.
To quote the P&W home page: "Pratt & Whitney's company headquarters is located in East Hartford, Connecticut. Home of our commercial and military engines and power systems businesses, Connecticut also represents the focal point for engineering, marketing, aftermarket services and customer support. Our business, regional and helicopter business, Pratt & Whitney Canada Corporation (P&WC), is based in Longueuil, Quebec."
Of course, P&W is a United Technologies Company.
Dave