| All Patents in class 241/157 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 2,459 | Feb. 12, 1842 | W. Murray, J. Murray | Machine for breaking and grinding corn and corncobs | corn grinders |
| 5,533 | Apr. 25, 1848 | A.P. Norton | Mill for Crushing and Grinding | corn grinders |
| 79,630 | Jul. 07, 1868 | R. Coward, J. Bingham | Improved Rock-Crusher and Tempering-Machine | ore processing apparatus |
| 220,626 | Oct. 14, 1879 | W.D. Leavitt | Improvement in machines for manufacturing flour | grist mills |
| 359,588 | Mar. 15, 1887 | J.F. Winchell | Crushing and Grinding Mill | grinding mills |
| 416,204 | Dec. 03, 1889 | J.F. Winchell | Crushing and Grinding Mill | grinding mills |
