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| All Patents in class 425/228 | |||||
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| Number | Date | Patentee | Title | Type | |
| 665,163 | Jan. 01, 1901 | G. Bass, O. Bergstrom | Press for molding and compressing various articles | wood compressing machines | |
| 3,098,261 | Jul. 23, 1963 | J.J. Littley, R. Burns | Powdered metal compacting press | ||