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| All Patents in class 221/190 | |||||
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| Number | Date | Patentee | Title | Type | |
| 394,170 | Dec. 11, 1888 | C.H. Graham | Blank Feeder and Gripping Die for Bolt Turning Machines | nut or bolt making machines | |
| 549,190 | Nov. 05, 1895 | W.R. Fox | Rivet-making machine | rivet making machines | |