US Patent: 370,255
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| Screw Driver
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Patentee:
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| Daniel R. Hart (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 23, 1887 |
| Granted: |
Sep. 20, 1887 |
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Patent Pictures:
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Daniel R. Hart patent September 20, 1887 |
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Stan Schulz
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Description: |
| The patent is for a rounded tip on screwdriver blades, shaped to conform to the rounded bottom of the "nick" in wood screws. The drawings show the shape applied to a screwdriver, or to a screwdriver bit for a brace. |
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