. 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. 554,421, :. Sbeets—SLeet 3 C. 0. HEGGEM. STEAM STIEET ROLLER. Patented Feb. 11, 1896. No. 556,346. 3 Sheets—Sheet 1 S. B. GRAY. TRACTION EH8IHE. Patented Mar. 17, ^^ JXYEMTCm 1 Jlljy/Tm.

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Keywords: ., bo, bookcentury1900, bookdecade1900, bookiddigestofunitedst00alle