Stephen Balzer immigrated to the U.S. from Hungaria in the 1870s. He built several automobiles in the 1890s, and the head of the Smithsonian Institution, Samual P. Langley, became aware of his rotary engines such as seen in this 1904 patent. Langley commissioned Balzer to build a rotary engine for Langley's experimental aircraft. Balzer designed and built the engine, and Langley's assistant Charles Manly improved it quite a bit. The Smithsonian seems to have a problem giving credit where credit is due, and attributed the engine to Manly. They also were quite reluctant to credit the Wright brothers with the first controlled filght. Balzer contributed a working prototype of this four wheeled automobile to the Smithsonian, and his obituary included a claim to having invented the engine used by Langley.
Other early automobiles are in the automobile technology category.