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| All Patents in class 34/86 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 127,654 | Jun. 04, 1872 | I.C. Smith | Coffee-Roaster Operated by Steam | |
| 2,200,379 | May 14, 1940 | R.D. Williams | Utilization of Waste Engine Heat | ||