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| All Patents in class 72/132 | |||||
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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 | |
| 778,472 | Dec. 27, 1904 | O.S. Beyer | Ring-making machine | metalworking machines | |
| 1,388,903 | Aug. 30, 1921 | F.H. Stolp | Tube Making Machine | metal bending machines | |