US Patent: 557,594
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| Milling-machine
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Patentees:
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| Stephen Moltrup (exact or similar names) - Beaver Falls, PA |
| William Moltrup (exact or similar names) - Beaver Falls, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 17, 1892 |
| Granted: |
Apr. 07, 1896 |
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Jeff Joslin
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Description: |
| This milling machine was "adapted especially to the manufacture of keys, gibs, &c." Those are among the products manufactured by the assignee company, Standard Gauge Steel Co., which also made crankshafts and squares |
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