| All Patents in class 451/284 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 39,817 | Sep. 08, 1863 | L.A. Johnson | Lathe for turning billiard balls |
 | 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 |
| | 363,994 | May 31, 1887 | T. Draper | Ball Turning Lathe |
 | 365,407 | Jun. 28, 1887 | H. Richardson | Machinery for grinding spherical balls |
| | 372,460 | Nov. 01, 1887 | T. Draper | Ball Turning Lathe |
 | 379,307 | Mar. 13, 1888 | R.B. Codling | Lathe |
| | 422,966 | Mar. 11, 1890 | W.D. Ormsby | Machine for Grinding Spherical Balls |
 | 520,019 | May 15, 1894 | R.H. Grant | Grinding-machine |
| | 1,210,937 | Jan. 02, 1917 | L.R. Heim | Roll-grinding machine |
