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| All Patents in class 72/19.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 372,423 | Nov. 01, 1887 | F. Mallet-Guy | Machine for the Manufacture of Wire Spirals | wire winding machines | |
| 1,869,006 | Jul. 26, 1932 | W.W. Criley | Solid Die Header | forging apparatus and accessories | |