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| Patents for Arthur A. Shafer | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,244,084 | Oct. 23, 1917 | A.A. Shafer | Tapping Machine | tapping machines | |
| 1,345,709 | Jul. 06, 1920 | A.A. Shafer | Threading Die Mechanism | tap and die holders | |
| 1,345,710 | Jul. 06, 1920 | A.A. Shafer | Collapsible Tap | taps and dies | |
| 1,560,487 | Nov. 03, 1925 | A.A. Shafer | Automatic Screw Threading Machine | metal threading machines | |