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| All Patents in class 241/189.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,461,764 | Jul. 17, 1923 | E.W. Silver | Ensilage cutter | animal food preparation machinery | |
| 1,745,646 | Feb. 04, 1930 | H.C. Schneider | Grinding Machine | fanning mills | |
| 1,797,673 | Mar. 24, 1931 | C.J. Pender | Cane Slicer and Leveler Attachment for Sugar Mill Rolls | sugar cane apparatus | |
| 4,946,109 | Aug. 07, 1990 | H.H. Lewis | Tooth assembly for rotary grinding apparatus | wood grinding machines | |