US Patent: 2,046,837
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| Means for Uniting a Screw with a Driver
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Patentee:
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| Henry F. Phillips (exact or similar names) - Portland, OR |
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Patent Dates:
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| Applied: |
Jul. 03, 1934 |
| Granted: |
Jul. 07, 1936 |
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Patent Pictures:
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1 | 2
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Russ Allen.
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Description: |
| Improvement of Phillips' and Fitzpatrick's previous patent applications of 21 Apr 1934. Three more configurations are introduced with two, three, and five bladed designs. The two bladed design is known to have been used by the three and five blade designs are not known. It is reported that Phillips Screw Company only sold the rights to manufacture but never produced Phillips screws or screwdrivers. |
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