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| All Patents in class 470/161 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,793,646 | Feb. 24, 1931 | E.B. Stimpson | Slitting machine | ||
| 1,793,647 | Feb. 24, 1931 | E.B. Stimpson | Rivet-slitting machine | riveting machines | |
| 1,793,648 | Feb. 24, 1931 | E.B. Stimpson, J.F. Suessle | Rivet-slitting machine | riveting machines | |
| 1,872,564 | Aug. 16, 1932 | E.B. Stimpson | Slotting machine | ||
| 1,893,509 | Jan. 10, 1933 | E.B. Stimpson | Slotting machine | ||