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| Patents for Otto W. Schaum | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 494,169 | Mar. 28, 1893 | O.W. Schaum | Combination Gage | |
| D30,349 | Mar. 14, 1899 | O.W. Schaum | Lathe Plate | ||
| D30,350 | Mar. 14, 1899 | O.W. Schaum | Lathe Plate | ||
 | 1,042,149 | Oct. 22, 1912 | O.W. Schaum | Lathe | |
| 1,252,365 | Jan. 01, 1918 | O.W. Schaum | Ball Grinding Machine | ||