. Digest of United States automobile patents from 1789 to July 1, 1899, including all patents officially classed as traction-engines for the same period. Chronologically arranged ... together with lists of patents in the classes of portable-engines, traction-wheels, electric locomotivs, and electric railway battery systems ... . No. 433,488. G. H. POND. TEAOTION ENGINE. Patented Aug. 5, 1890. (Ho Holel.) No. 434,131. J. B. HABBIS. TBAOTIOII ENGINE. Patented Ang. 12,

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