US Patent: 1,321,625
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| Multiple Wrench Tool
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Patent Dates:
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| Applied: |
Aug. 16, 1917 |
| Granted: |
Nov. 11, 1919 |
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Patent Pictures:
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Albert D. Grover Pat. Nov. 11, 1919 |
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Description: |
| The tool has a rotating head with open end wrench sizes. The slider holds the rotating head when slid into the wrench body, and has a screwdriver at the end when extended. The Grover Wrench was issued as an adjustment tool for Grover Tuners for stringed musical instruments. |
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