US Patent: 1,422,563
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| Wrench
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Patentee:
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| Nelson Woodthorpe Graham (exact or similar names) - Johannesburg, Transvaal, South Africa |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 15, 1920 |
| Granted: |
Jul. 11, 1922 |
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Patent Pictures:
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Patent 1,422,563 - edited drawing |
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Stan Schulz
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Description: |
| "Pin / rows of holes" adjustment means applied to a Stillson type pipe wrench. Staggering the rows of holes allows for finer adjustment. |
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