| All Patents in class 241/32 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 357,767 | Feb. 15, 1887 | C.G. Freeman | Grinding Mill |
 | 471,345 | Mar. 22, 1892 | D.C. Stover | Grinding Mill |
 | 616,659 | Dec. 27, 1898 | P.W. Gates, T.W. Capen | Rock or Ore Breaker |
| | 786,293 | Apr. 04, 1905 | H.L. Johnston | Coffee grinder |
| | 842,681 | Jan. 29, 1907 | G.H. Mayne | Cob Breaker or Crusher |
 | 855,099 | May 28, 1907 | A.M. Dellinger | Vertical-disk grinding-mill |
| | 864,786 | Sep. 03, 1907 | H.L. Johnston | Driving mechanism |
| | 1,291,534 | Jan. 14, 1919 | H.L. Johnston | Coffee-grinder |
| | 1,502,675 | Jul. 29, 1924 | H.L. Johnston | Grinder for coffee and the like |
