Clayton Mark and Company

Clayton Mark and Company was a manufacturer of steel pipe and water well supplies located in Evanston, Illinois.

[3] Clayton Mark products were sold throughout the United States and many countries worldwide.

[3] For example, Mark's forged steel unions (high pressure fittings) were used in oil wells from Texas to Arabia.

[3] The steel tubing manufactured at Clayton Mark and Company was used in the making of furniture, automobiles, and bicycles whose market was worldwide.

In addition, he founded Marktown, a planned worker community to house its employees in East Chicago, Indiana.