"Oglebay Norton Corporation" . "Columbia Transportation Company" . . "Oglebay-Norton Company" . "Oglebay, Norton, and Company" . "Oglebay Norton Marine Services" . . "Partner Oglebay Norton & Co" . "Oglebay Norton Corporation" . . "Oglebay Norton" . . . "Oglebay Norton Industrial Sands, Inc." . "Oglebay Norton Company" . . "Oglebay Norton Co." . . . "Manager Oglebay Norton & Co." . .