US Patent: 1,328,428
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| Socket-Wrench
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Patentee:
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| David F. Graham (exact or similar names) - Coudersport, PA |
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Patent Dates:
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| Applied: |
May 08, 1919 |
| Granted: |
Jan. 20, 1920 |
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Patent Pictures:
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David F. Graham patent January 20, 1920 |
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Stan Schulz
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Description: |
| The focus of the patent is the sleeve and spring which connect the socket and handle. The socket will fit on either end of the handle, which has a uniform cross-section throughout.
An illustration in a June, 1920 AUTOMOBILE TOPICS ad for the set shows the spring clip, and sockets matching Graham's design patent no. D59,417. |
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