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| All Patents in class 241/239 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE2,119 | Dec. 05, 1865 | A.S. Macomber | Improvement in straw-cutters | |
 | 294,673 | Mar. 04, 1884 | E. Rhodes | Grinding-mill | |
 | 355,179 | Dec. 28, 1886 | R.C. Kirby | Bark-cutter | |
| 682,158 | Sep. 10, 1901 | D.L. Adelsperger | Apparatus for Grinding, Crushing, or Feeding | ||
| 1,404,518 | Jan. 24, 1922 | O.C. Frick | Shear-bar anchor for feed cutters | ||
 | 2,174,461 | Sep. 26, 1939 | G.O. Leopold, T.J. Fegley | Ice breaker | |
 | 2,195,363 | Mar. 26, 1940 | G.O. Leopold, T.J. Fegley | Ice crusher | |