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| Patents for Carroll R. Alden | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,708,491 | Apr. 09, 1929 | C.R. Alden | Method of finishing ball bearings | industrial machine bearings | |
| 1,864,707 | Jun. 28, 1932 | C.R. Alden | Slip bushing | drill press accessories | |
| 2,000,553 | May 07, 1935 | C.R. Alden | Machine tool | horizontal boring mills | |
| 2,012,677 | Aug. 27, 1935 | C.R. Alden | Spindle structure | grinders | |