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| Patents for Pittsburgh Malleable Iron Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 870,781 | Nov. 12, 1907 | G. Heckling | CRAFT roller-jaw pipe wrench | pipe wrenches | |
| 1,593,588 | Jul. 27, 1926 | F. Moore | Wrench | pipe wrenches | |