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| All Patents in class 100/203 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,404,490 | Jan. 24, 1922 | F.E. Stevenson | Combined Filter and Hydraulic Press | liquid extracting machines | |
| 2,207,221 | Jul. 09, 1940 | G.W. Johnston | Press | seed or nut oil apparatus | |