US Patent: 642,709
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| Pipe Wrench
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Patentees:
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| Otto Otteson (exact or similar names) - Menomonee Falls, WI |
| Martin Otteson (exact or similar names) - Menomonee Falls, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 03, 1899 |
| Granted: |
Feb. 06, 1900 |
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Patent Pictures:
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Otto and Martin Otteson patent February 6, 1900 |
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Stan Schulz
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Description: |
| A compression spring keeps the hook jaw engaged; the frame with the hook jaw is shifted by an adjusting screw. The position of the adjusting screw is unusual. |
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