The brand of Lee C. Moore, A Woolslayer Company is firmly rooted in the legacy of innovation.  Its recognition for outstanding, innovative design and exceptional quality began in 1907 with a salesman by the name of Lee C. Moore and has been carried into the next century by Homer J. and Joseph R. Woolslayer. In 1912, in Pittsburgh, Pennsylvania, Lee C. Moore patented a system that clamped and secured bracing to steel pipe legs to build a steel derrick.  At that time, oil derricks were commonly wooden cable tool rigs. The foresight and vision of using steel for the construction of oil drilling structures proved timely and correct.  Lee C. Moore became a prominent designer and manufacturer of steel derricks prior to the adaptation of API Standards in the 1920s and was a major contributor to the development of those standards.  By the end of the 1920s, wooden drilling structures were largely replaced with steel structures.Today, Lee C. Moore, A Woolslayer Company provides engineering and design of drilling equipment from its corporate headquarters in Tulsa, Oklahoma.  Test assembly and shipping by air, water, and land are available from its Port of Catoosa, Oklahoma production facility.