R. G. LeTourneau, also the founder of LeTourneau University, founded R.G. LeTourneau, Inc. in 1929 in California as a contractor of earthmoving equipment. LeTourneau manufactured products in Longview, Texas.
During World War II, the company provided 70% of the Allies' earthmoving equipment. In 1954, it built the first jack-up drilling rig. In 1955, it made the first log-stacker machine. In 1965, the company made the first straddle carrier.
In 1970, just after the death of the founder, the company was sold to Marathon Manufacturing Company and was renamed Marathon LeTourneau Company.
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- "Rowan Buys Marathon LeTourneau From General Cable". AP News. November 10, 1993.
- "Rowan Announces Agreement to Sell LeTourneau Technologies, Inc" (Press release). PR Newswire. May 16, 2011.
- Koyitty, Bijoy (August 31, 2011). "Joy Global sells LeTourneau's drilling unit; shares up". Reuters.
- Furr, Laura (August 31, 2015). "Cameron sells offshore rig business". American City Business Journals.
- Orlemann, Eric C. (2001). LeTourneau Earthmovers. St. Paul, Minnesota: Motorbooks International, MBI. ISBN 9780760308400.
- Niemela, John H.; Hardy, Dale. A History of R.G. LeTourneau's Earliest Scrapers: Culminating in the 1922 Mountain Mover (PDF).
- LeTourneau, R.G. Mover of Men and Mountains, Autobiography (Prentice-Hall 1960, 1967; Reprint Moody Press 1967, 1972), ISBN 0-8024-3818-0
- " The LeTourneau Legend", Equipment history, ISBN 0-646-27692-1 (Global General Publishing Pty Ltd; 1995, 1998, 3rd revised edition 2007)
- " The LeTourneau Archive", Equipment history, ISBN 0-9585608-0-3 (Global General Publishing Pty Ltd; 2005)
- " WABCO Australia", LeTourneau Australia history, ISBN 0-9585608-1-1 (Global General Publishing Pty Ltd; 2007)