US Patent: 377,783
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| Rotary tool driver
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Patentee:
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| George Frederick Shaver (exact or similar names) - New York, NY |
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Patent Dates:
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| Applied: |
Sep. 03, 1887 |
| Granted: |
Feb. 14, 1888 |
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Patent Pictures:
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Steve Gosselin
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Description: |
| The Patent drawing shows an interchangeable bit but the only known examples have a one piece rotary shank screwdriver that will only drive screws. In the fully closed position the shaft locks and they will remove screws. |
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