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| All Patents in class 241/247 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,209X | Oct. 28, 1835 | A.P. Jordon | Grinding and crushing corn machine | miller | |
| 357,767 | Feb. 15, 1887 | C.G. Freeman | Grinding Mill | grinding mills | |
| 437,640 | Sep. 30, 1890 | G.W. Brown | Grinding-machine | ||
| 591,575 | Oct. 12, 1897 | L.T. Snow | Food Chopper | food grinders | |
| 864,786 | Sep. 03, 1907 | H.L. Johnston | Driving mechanism | coffee mills | |
| 1,362,724 | Dec. 21, 1920 | G.E. Marsden | Feed-mill | grist mills | |