| All Patents of Type: grindstone frames |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 134,363 | Dec. 31, 1872 | G.L. Cummings | Improvement in grindstone-frames | grindstone frames |
| 211,096 | Jan. 07, 1879 | J.E. Hoppen | Improvement in grindstone-frames | grindstone frames |
| 367,331 | Jul. 26, 1887 | W.F. Barnes | Grindstone-frame | grindstone frames |
| 569,806 | Oct. 20, 1896 | H. White | Grindstone-frame | grindstone frames |
| 571,545 | Nov. 17, 1896 | J. Steffenson | Treadle for grindstone | grindstone frames |
| 1,180,448 | Apr. 25, 1916 | C.E. Shields | Power-grinder | grindstone frames |
| 1,210,145 | Dec. 26, 1916 | L.V. Calhoun | Folding grindstone-frame | grindstone frames |
