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| All Patents in class 34/140 | |||||
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| Number | Date | Patentee | Title | Type | |
| 507,538 | Oct. 31, 1893 | B. Lilienfeld, D. Grove | Coffee Roaster | coffee roasters | |
| 525,905 | Sep. 11, 1894 | N.H. Jensen | Roaster | coffee roasters | |
| 627,993 | Jul. 04, 1899 | D.B. Fraser | Coffee Roaster. | coffee roasters | |
| 661,568 | Nov. 13, 1900 | W. Walter | Coffee Roaster | roasting coffee | |