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| All Patents in class 425/422 | |||||
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| Number | Date | Patentee | Title | Type | |
| 597,110 | Jan. 11, 1898 | C.W. Fox, J.G. Blount, B.J. Noyes | Machine for making tablets, pills, &c. | ||
| 1,357,258 | Nov. 02, 1920 | F.E. Stevenson | Press | hydraulic presses | |
| 1,867,972 | Jul. 19, 1932 | C.J. Zube, L.S. Hubbert | Press for Manufacturing Molded Articles | hydraulic presses | |