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| All Patents in class 227/61 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,517,471 | Dec. 02, 1924 | E.B. Stimpson | Rivet-setting machine | riveting machines | |
| 1,731,399 | Oct. 15, 1929 | E.B. Stimpson | Riveting machine | riveting machines | |