| All Patents in class 72/439 |
Patents 46 -
60
of 80
      |
| Number | Date | Patentee | Title | Type |
| 860,784 | Jul. 23, 1907 | O.S. Beyer | Drop Hammer | drop hammers |
| 882,588 | Mar. 24, 1908 | W.T. Sears | Drop Hammer | drop hammers |
| 893,561 | Jul. 14, 1908 | A.A. Ambler | Drop Hammer | drop hammers |
| 915,012 | Mar. 09, 1909 | L.G. Bayrer | Drop Press and Attachment Therefor | stamping presses |
| 937,938 | Oct. 26, 1909 | F. Holmgren | Drop Hammer or the Like | drop hammers |
| 940,956 | Nov. 23, 1909 | G.W. Conklin | Lifting Board for Drop Hammers | drop hammers |
| 947,657 | Jan. 25, 1910 | O. Werner | Drop Hammer | drop hammers |
| 960,785 | Jun. 07, 1910 | A. Beaudry | Power-hammer | drop hammers |
| 1,002,231 | Sep. 05, 1911 | C.J. Dalley | Lifting Board for Drop Hammers | drop hammers |
| 1,037,735 | Sep. 03, 1912 | H.E. Derbyshire | Safety-latch for board drop-hammers | drop hammers |
| 1,051,779 | Jan. 28, 1913 | H. Terhune | Drop Hammer | drop hammers |
| 1,068,225 | Jul. 22, 1913 | H.E. Derbyshire | Drop-hammer roll-release mechanism | drop hammers |
| 1,091,523 | Mar. 31, 1914 | G.H. Merrill | Lifting Board for Drop Hammers | drop hammers |
| 1,246,183 | Nov. 13, 1917 | H. Terhune | Drop-hammer | drop hammers |
| 1,311,942 | Aug. 05, 1919 | A. Aldridge, H. Terhune | Electromagnetically-controlled board drop-hammer | drop hammers |
