In the spring of 1842 he bought six small threshing machines, on credit, and started for the territory of Wisconsin. He disposed of all his machines, except one, which he operated himself as a thresherman. In 1844 he built his first threshing machine, which embodied many ideas of his own, and in doing so laid the foundation of the largest manufacturing concern of its kind in the world. For a number of years he continued to do business in a small way, at the close of each year finding him a little in advance of the previous year, until in 1863 his business had assumed such large proportions that he organized the firm of J. I. Case & Company, forming a co-partnership with Stephen Bull, R. H. Baker and M. B. Erskine. These men formed an ideal combination for the growth and development of the business." From that time forward the trade steadily expanded. "The year 1897 proved to be the beginning of a new epoch in the history of the company. The process of development was gradual, keeping pace with the world’s onward march of progress. In 1880 the co-partnership organized in 1863 was dissolved, the name being changed to J. I. Case Threshing Machine Company and so incorporated.