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| Patents for Alfred Trosch | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,432,500 | Oct. 17, 1922 | A. Trosch | Tool Holder | metal lathe accessories and attachments | |
| 1,570,799 | Jan. 26, 1926 | G.W. Moreton, A. Trosch | Work Clamping Mechanism for Vertical Boring and Turning Mills | ||
| 2,202,767 | May 28, 1940 | A. Trosch | Planer | metal planers | |