Keywords: Patent 830,721.jpg en STEERING MECHANISM FOR SELF PROPELLING MACHINES http //www google com/patents id qhhtAAAAEBAJ pg PA1 dq CB+King as_drrb_is b as_minm_is 1 as_miny_is 1888 as_maxm_is 12 as_maxy_is 1932 source gbs_selected_pages cad 1 v onepage q f false United States Patent Office 1906 PD-USGov U S Patent drawings |