| All Patents in class 451/292 |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
 | 938,803 | Nov. 02, 1909 | C.E. Van Norman | Metal-working machinery |
| | 1,203,844 | Nov. 07, 1916 | A.C. Page, C. Booth | Grinding Machine |
| | 1,263,057 | Apr. 16, 1918 | J.T. Griffin | Mica Grinding Machine |
| | 1,264,928 | May 07, 1918 | L.R. Heim | Device for Feeding Rolls for End Grinding |
| | 1,519,611 | Dec. 16, 1924 | F.E. Gardner | Grinding machine |
| | 1,523,952 | Jan. 20, 1925 | J. Nielsen, R.D. Gardner, E.B. Gardner | Grinding machine |
| | 1,530,488 | Mar. 24, 1925 | F.E. Gardner | Grinding machine |
| | 1,531,282 | Mar. 31, 1925 | F.E. Gardner | Grinding machine |
| | 1,548,562 | Aug. 04, 1925 | H.K. Spencer | Means For And Method Of Handling Work Pieces |
| | 1,548,563 | Aug. 04, 1925 | H.K. Spencer | Means For Handling Articles |
