| All Patents in class 451/331 |
Patents 1 -
10
of 39
      |
| Picture | Number | Date | Patentee | Title |
 | 24,196 | May 31, 1859 | W. Clemson | Machine for Grinding Saws |
 | 78,915 | Jun. 16, 1868 | E.C. Atkins | Improvement in machines for polishing metal plates |
| | 132,231 | Oct. 15, 1872 | A. Assman | Improvement in Grinding Apparatus |
 | RE5,228 | Jan. 07, 1873 | A. Warth | Machine for cutting lead pencils |
 | 430,398 | Jun. 17, 1890 | J.M. Nash | Machine for smoothing curved surfaces |
 | 483,288 | Sep. 27, 1892 | A.B. Landis | Grinding-machine |
 | 672,511 | Apr. 23, 1901 | J.M. Nash | Abrading-machine |
 | 704,348 | Jul. 08, 1902 | J.N. Lapointe | Grinding-machine |
 | 734,897 | Jul. 28, 1903 | A.B. Landis | Automatic grinding-machine |
| | 957,935 | May 17, 1910 | C.M. Conradson | Grinding Machine Feeding Mechanism |
