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| All Patents in class 99/518 | |||||
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| Number | Date | Patentee | Title | Type | |
| 155,300 | Sep. 22, 1874 | J.H. Grubb | Apparatus for Treating Coffee | roasting coffee | |
| 512,819 | Jan. 16, 1894 | C.A. Hege | Machine for hulling coffee or for other purposes | clover hullers | |
| 631,616 | Aug. 22, 1899 | E. Canziani | Apparatus for Treating Coffee Berries | clover hullers | |