Mellon became a co-owner of Koppers, which produced a more sophisticated coking oven than the one that had earlier been pioneered by Frick
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Mellon became a co-owner of Koppers, which produced a more sophisticated coking oven than the one that had earlier been pioneered by Frick
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.