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| All Patents in class 72/181 | |||||
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| Number | Title | Classification(s) | |||
| 18,906 | Cornices, Machine | 72/181 | |||
| 909,341 | Machine for Working Sheet Metal | 72/181, 72/221 | |||
| 909,644 | Machine for Forming Bars or Rounds from Metal Plates | 72/181, 72/48 | |||
| 1,184,947 | Pipe-forming machine | 72/181, 72/52 | |||
| 1,322,926 | Metal Bending Machine | 72/181 | |||
| 2,283,258 | Method of and means for producing sheet metal joint locks and the like | 29/283.5, 72/181, 72/48 | |||
| 3,796,081 | Roll-forming machines | 72/181, 72/226 | |||