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| All Patents in class 425/376.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,810,181 | Oct. 22, 1957 | K. Ruckstuhl | Extrusion press | |
| 2,875,469 | Mar. 03, 1959 | B.H. Davis | Automatic stock feed into extrusion apparatus | ||
 | 3,241,185 | Mar. 22, 1966 | R.A. Hufford | Extruder with means to vary ram pressure | |