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| All Patents in class 222/459 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,745,716 | Feb. 04, 1930 | G.W. Rynders | Hopper | conveyors and hoppers | |
| 1,807,942 | Jun. 02, 1931 | E.B. Stimpson | Rivet feed | riveting machines | |