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| Patents for Prentice Conradson | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,534,301 | Apr. 21, 1925 | P. Conradson | Grinding Machine | internal grinders | |
| 1,534,302 | Apr. 21, 1925 | K.F. Gallimore, H.E. Kempton, P. Conradson | Grinding Machine | internal grinders | |
| 1,535,452 | Apr. 28, 1925 | P. Conradson | Grinding Machine | internal grinders | |
| 1,695,759 | Dec. 18, 1928 | P. Conradson | Grinding Machine | grinding machines | |