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| All Patents in class 100/904 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,650,495 | Nov. 22, 1927 | G.B. Damon | Briquetting apparatus | ||
| 2,878,512 | Mar. 24, 1959 | R. Davis | Extrusion apparatus with stock-displacing discharge end on feed screw | wire insulating machines | |