| All Patents in class 72/446 |
Patents 16 -
30
of 34
      |
| Number | Date | Patentee | Title | Type |
| 611,695 | Oct. 04, 1898 | R.W. Lundy | Straightening Machine | metal straightening machines |
| 630,484 | Aug. 08, 1899 | M.H. Brown | Rail, Bar or Pipe Bender | metal bending machines |
| 765,020 | Jul. 12, 1904 | C. Leonhardt | Power Hammer | power hammers |
| 799,282 | Sep. 12, 1905 | H. Vigneault | Power Hammer | power hammers |
| 837,519 | Dec. 04, 1906 | W.G. Simcock, G.H. Tolley | Power Hammer | power hammers |
| 855,151 | May 28, 1907 | F.I. Matthews, L. Wilson | Power Hammer | power hammers |
| 884,786 | Apr. 14, 1908 | A.H. Wertz | Foot Power Hammer | foot operated hammers |
| 941,093 | Nov. 23, 1909 | J.L. Painter | Power Hammer | power hammers |
| 1,074,009 | Sep. 23, 1913 | S.K. Niemi | Hammer | trip and helve hammers |
| 1,103,918 | Jul. 14, 1914 | J.F. Overcash | Hammer | trip and helve hammers |
| 1,297,990 | Mar. 25, 1919 | W. Blacker | Treadle Hammer | power hammers |
| 1,460,424 | Jul. 03, 1923 | P.H. Leckinger | Riveting Hammer | rivet making machines |
| 2,185,096 | Dec. 26, 1939 | R.B. Treer | Press | stamping presses |
| 2,449,647 | Sep. 21, 1948 | R.P. Fitzgerald | Drop hammer | drop hammers |
| 2,942,503 | Jun. 28, 1960 | R.P. Fitzgerald | Power operated hammers | drop hammers |
