. 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 ... . WITNESSES INVENTOR:,Lt ATTORNEYS WITNESSES INVENTOR,^ ATTORNEYS \22 ELECTRICITY heets—Sheet i. No. 470,841. D. MADDEN. WHEELED OONVETANOE. Patented Mar. 15, 1892.

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Keywords: ., bo, bookcentury1900, bookdecade1900, bookiddigestofunitedst00alle