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| All Patents in class 100/92 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,984,173 | May 16, 1961 | W.C. Briggs, J.B. Roche | Extrusion die for briquetting machine | ||
| 6,381,869 | May 07, 2002 | R.R. Lunan | Flower press | ||