US Patent: D108,143
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| Design for a Wrench Member
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Patentee:
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| Sigmund Mandl (exact or similar names) - Milwaukee, WI |
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Patent Dates:
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| Applied: |
Feb. 27, 1937 |
| Granted: |
Jan. 25, 1938 |
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Patent Pictures:
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Sigmund Mandl design patent Jan. 25, 1938 |
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Stan Schulz
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Description: |
| The design is for a round socket with three grooves and a rounded taper in the body.
Alloy Artifacts shows the Blackhawk #401xx series sockets with the three rings on the drive end. The smallest sizes of the socket also have the rounded taper. |
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