| All Patents in class 72/439 |
Patents 31 -
45
of 80
      |
| Number | Date | Patentee | Title | Type |
| 576,273 | Feb. 02, 1897 | F. Lombard | Drop Hammer | drop hammers |
| 577,531 | Feb. 23, 1897 | F. Lombard | Drop Hammer | |
| 601,060 | Mar. 22, 1898 | E.W. Merrill, Jr. | Drop-hammer | drop hammers |
| 609,836 | Aug. 30, 1898 | G. Rowbottom | Drop Hammer | drop hammers |
| 614,692 | Nov. 22, 1898 | F.C. Billings | Drop Hammer | drop hammers |
| 624,101 | May 02, 1899 | D.C. Griggs, G. Rowbottom | Drop Hammer | drop hammers |
| 627,349 | Jun. 20, 1899 | F.A. Pratt | Drop Hammer Operating Means | drop hammers |
| 627,350 | Jun. 20, 1899 | F.A. Pratt | Drop Hammer Operating Means | drop hammers |
| 642,289 | Jan. 30, 1900 | F.C. Billings | Metal Working Machine | drop hammers |
| 680,525 | Aug. 13, 1901 | J. Chevalier, P. Hanzer | Drop Hammer | drop hammers |
| 729,855 | Jun. 02, 1903 | G.F. Fuller | Drop Hammer | drop hammers |
| 761,923 | Jun. 07, 1904 | H.M. Simonson | Drop Hammer | drop hammers |
| 766,950 | Aug. 09, 1904 | H.J. Hinde | Controlling Mechanism for Drop Hammers | drop hammers |
| 799,352 | Sep. 12, 1905 | M. Merrill | Drop Hammer | drop hammers |
| 851,677 | Apr. 30, 1907 | D.C. Griggs, G.B. Lamb | Drop Hammer | power hammers |
