US Patent: D45,165
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| Wrench
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Patentee:
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| Henry Ernest Warren (exact or similar names) - Lancaster, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 13, 1913 |
| Granted: |
Jan. 13, 1914 |
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Patent Pictures:
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H. E. Warren patent January 13, 1914 |
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Stan Schulz
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Description: |
| The design incorporates a square "driver" with a smaller hexagonal extension.
H.E. Warren was general manager of the Mac-It-Parts Company of Lancaster, PA and hex drive set screws appear to have been one of the company's products.
The patent is noted as a reference in patent no. 2,672,066. |
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