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| Patents Granted on 1921-06-14 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,381,457 | Jun. 14, 1921 | M.H. Derringer | Tool Holder | lathe tool holders and tool posts | |
| 1,381,509 | Jun. 14, 1921 | F.J. Schwimmer | Bolt-Heading Machine | bolt heading machines | |