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| All Patents in class 72/246 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,085,568 | Jan. 27, 1914 | G.L. Knights | Forming sheet metal for automobile and carriage work | ||
| 3,590,618 | Jul. 06, 1971 | W. Hyams | Cross roll straightener machine | metal straightening machines | |