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| All Patents in class 198/546 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,179,747 | Nov. 14, 1939 | P.C. Malmsten | Means for conveying aggregates in portable rock crusher machines | stone crushers | |
| 2,210,093 | Aug. 06, 1940 | S.J. Morrissey | Material handling device | ||