| All Patents in class 72/427 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 441,927 | Dec. 02, 1890 | T.J. Bray | Machine for Cold Drawing Metallic Pipe | pipe making machines |
| 551,887 | Dec. 24, 1895 | F.P. Cady | Machine for Making Split Keys | metalworking presses |
| 575,790 | Jan. 26, 1897 | C.D. Rice | Forging Machine | forging apparatus and accessories |
| 787,339 | Apr. 11, 1905 | R.F. Massa | Attachment for Drop Hammers | drop hammers |
| 2,187,479 | Jan. 16, 1940 | H.A. Zwierlein | Ejector Mechanism for Metal Forming Presses | forging apparatus and accessories |
| 2,268,125 | Dec. 30, 1941 | L.W. Nash, G.A. Martin | Coiler | sheet metal |
| 2,408,542 | Oct. 01, 1946 | F.H. Wyman, J.M. Malik | Forging die and mount assembly | forging dies |
| 2,956,609 | Oct. 18, 1960 | R.M. Shaw, Jr. | Bending Machines | metal bending machines |
| 3,089,361 | May 14, 1963 | M.W. Lamprecht | Forging machine | forging machines |
| 3,283,551 | Nov. 08, 1966 | D.H. Kraft, R.H. Armbruster | Automatic feed mechanism for a press | metalworking presses |
| 3,699,882 | Oct. 24, 1972 | H.E. Keithley, R.A. Helrigel | Knockout bar assembly for presses | metalworking presses |
| 4,879,894 | Nov. 14, 1989 | J.K. Forlow, R.J. Benedict | Press with Movable Workpiece Support Carrier | punch presses |
