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| All Patents of Type: liquid extracting machines | |||||
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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 | |
| 1,700,565 | Jan. 29, 1929 | H.F. MacMillin, W. Ernst | Laminated Curb | liquid extracting machines | |
| 1,755,353 | Apr. 22, 1930 | L.S. Hubbert | Filter Pot Press | liquid extracting machines | |