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| All Patents in class 221/264 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,487,365 | Mar. 18, 1924 | E.B. Stimpson | Rivet-setting machine | riveting machines | |
| 1,651,976 | Dec. 06, 1927 | E.B. Stimpson | Rivet-setting machine | riveting machines | |