US Patent: 450,681
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| Wrench
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Patentee:
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| Daniel R. Porter (exact or similar names) - Chelsea, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 10, 1890 |
| Granted: |
Apr. 21, 1891 |
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Patent Pictures:
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Daniel R. Porter patent April 21, 1891 |
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Stan Schulz
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Description: |
| Improvement to patent no. 426,956. "Ears" extending from the frame hold and align the adjusting nut of a "Stilson" type pipe wrench. Corresponding British patent GB-189106878 was registered April 21, 1891; Canadian patent CA-41,437 was granted Dec. 30, 1892. |
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