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BiographyIn 1919 a group of tool and die makers in Highland Park, Michigan — all of them former employees of Ford Motor Co. — established Ex-Cell-O Tool & Manufacturing Co. Over the next few years they found a niche in making parts and fixtures for aircraft, although they also made grinding machines and air-driven grinding spindles. In 1927 the company name changed to Ex-Cell-O Aircraft & Tool Corp. In 1937 the name changed again to Ex-Cell-O Corp., likely to indicate their increasingly diverse lines of business, including machine tools such as grinders and milling machines.--vintagemachinery.org.