| All Patents in class 451/284 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 39,817 | Sep. 08, 1863 | L.A. Johnson | Lathe for turning billiard balls | wood lathes |
| 49,122 | Aug. 01, 1865 | J.L. Knowlton | Improved machine for rounding and polishing balls | |
| 52,244 | Jan. 23, 1866 | C. Forster | Improvement in Lathes for Turning Spherical Shot and Shell | cannons |
| 363,994 | May 31, 1887 | T. Draper | Ball Turning Lathe | wood lathes |
| 365,407 | Jun. 28, 1887 | H. Richardson | Machinery for grinding spherical balls | grinders |
| 372,460 | Nov. 01, 1887 | T. Draper | Ball Turning Lathe | wood lathes |
| 379,307 | Mar. 13, 1888 | R.B. Codling | Lathe | wood lathes |
| 422,966 | Mar. 11, 1890 | W.D. Ormsby | Machine for Grinding Spherical Balls | grinding machines |
| 520,019 | May 15, 1894 | R.H. Grant | Grinding-machine | grinders |
| 1,252,365 | Jan. 01, 1918 | O.W. Schaum | Ball Grinding Machine | |
| 1,264,930 | May 07, 1918 | L.R. Heim | Roll Grinding Machine | |
| 1,707,708 | Apr. 02, 1929 | J.E. Caster | Process for the Production of Spherical Articles | grinding machines |
