| All Patents in class 72/181 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 18,906 | Dec. 22, 1857 | A. Johnson | Cornices, Machine | |
| 909,341 | Jan. 12, 1909 | I.J. Shifley | Machine for Working Sheet Metal | sheet metal flanging machines |
| 909,644 | Jan. 12, 1909 | S. McCloud | Machine for Forming Bars or Rounds from Metal Plates | sheet metal forming rolls |
| 1,184,947 | May 30, 1916 | J.A. Gossett, J.C. Hewitt | Pipe-forming machine | pipe making machines |
| 1,322,926 | Nov. 25, 1919 | P.W. Miller | Metal Bending Machine | sheet metal |
| 2,283,258 | May 19, 1942 | J. Jensen | Method of and means for producing sheet metal joint locks and the like | sheet metal bending machines |
| 3,796,081 | Mar. 12, 1974 | A.S. Boardman | Roll-forming machines | |
