US Patent: 133,536
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| Wrench
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Patentee:
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| William Johnson (exact or similar names) - Milwaukee, WI |
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Patent Dates:
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| Granted: |
Dec. 03, 1872 |
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Patent Pictures:
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Wm. Johnson Pat. Dec. 3, 1872 |
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Stan Schulz
Schumacher v. Cornell
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Description: |
| This barrel bung bushing wrench has a movable inner holder that engages a stud on the inner edge of the bushing. See pat. nos. 118,617 and 69,563 for earlier bushing wrench patents.
According to Ken Cope's "American Wrench Makers 1830-1930" Schumacher & Johnson of Milwaukee produced this wrench and Johnson's Aug. 12, 1873 patent (no. 141,794).
This patent was involved in a patent infringement lawsuit that was taken to the U.S. Supreme Court. (Schumacher v. Cornell) |
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