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| All Patents in class 241/204 | |||||
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| Number | Date | Patentee | Title | Type | |
| 324,937 | Aug. 25, 1885 | F.A. Huntington | Rock crusher or breaker | ore processing apparatus | |
| 1,980,952 | Nov. 13, 1934 | G.O. Leopold, T.J. Fegley | Machine for breaking cubes of ice | ||
| 2,065,677 | Dec. 29, 1936 | G.O. Leopold, T.J. Fegley | Machine for breaking cubes of ice | ||
| 2,174,116 | Sep. 26, 1939 | G.A. Bilocq | Stone crusher | stone crushers | |