| All Patents in class 72/444 |
Patents 31 -
36
of 36
      |
| Number | Date | Patentee | Title | Type |
| 1,833,800 | Nov. 24, 1931 | H. Terhune | Knock-off for board drop hammers and the like | drop hammers |
| 1,929,021 | Oct. 03, 1933 | M.H. Flynn | Multiple Roll Set Board Drop Hammer | drop hammers |
| 1,954,159 | Apr. 10, 1934 | J.C. Wattleworth | Drop Hammer | drop hammers |
| 2,185,096 | Dec. 26, 1939 | R.B. Treer | Press | stamping presses |
| 2,642,114 | Jun. 16, 1953 | R.J. Ebert, C.J. Bath | Metal Forming Press | metal bending machines |
| 4,809,535 | Mar. 07, 1989 | D.L. Ellis | Hydraulic press and process for molding or forming an article including incrementally variable positioned slide | hydraulic metalworking presses |
