| Patents for Diamond Iron Works, Inc. |
Patents 1 -
6
of 6
      |
| Picture | Number | Date | Patentee | Title |
| | 1,950,501 | Mar. 13, 1934 | J.J. MacKay | Rock crushing plant |
| | 2,117,300 | May 17, 1938 | J. Corser | Rock crushing machine |
| | 2,179,747 | Nov. 14, 1939 | P.C. Malmsten | Means for conveying aggregates in portable rock crusher machines |
| | 2,210,093 | Aug. 06, 1940 | S.J. Morrissey | Material handling device |
| | 2,256,731 | Sep. 23, 1941 | G.C. Winther | Means for forming and segregating rock chips from aggregates |
| | 2,314,827 | Mar. 23, 1943 | R.M. Hortvet | Process for extracting pure nitrogen from air |
