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| All Patents in class 34/92 | |||||
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| Number | Date | Patentee | Title | Type | |
| 509,298 | Nov. 21, 1893 | D.P. Cardozo | Apparatus for Roasting Coffee or Other Substances | coffee roasters | |
| 661,568 | Nov. 13, 1900 | W. Walter | Coffee Roaster | roasting coffee | |