| Patents for Diamond Iron Works |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 1,794,177 | Feb. 24, 1931 | C.T. Johnson | Apparatus for unloading cars | |
| 1,950,501 | Mar. 13, 1934 | J.J. MacKay | Rock crushing plant | ore processing apparatus |
| 2,117,300 | May 17, 1938 | J. Corser | Rock crushing machine | ore processing apparatus |
| 2,179,747 | Nov. 14, 1939 | P.C. Malmsten | Means for conveying aggregates in portable rock crusher machines | stone crushers |
| 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 | |
| 2,311,131 | Feb. 16, 1943 | C.W. Rudolph | Means for controlling movement of trucks into and from heated chambers of furnaces | |
| 2,314,827 | Mar. 23, 1943 | R.M. Hortvet | Process for extracting pure nitrogen from air | |
