Robert G. LeTourneau was the leading advocate of high-speed, high-capacity, mobile earthmoving machinery, and his numerous inventions spearheaded the concept. His interest in such equipment stemmed ...
The Case-Trackson Model CD with tracks pulls a scraper to excavate for a subdivision in 1930. A Tarkington Township crew pulls a road drag behind a Case steel-wheel tractor in Sangamon County, Ill., ...
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