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| Patents for Fred M. Kern | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,637,487 | Aug. 02, 1927 | F.M. Kern | Process of Sizing and Finishing Articles of Fiber | grinding machines | |
| 1,733,492 | Oct. 29, 1929 | E.R. Seward, F.M. Kern | Grinding Machine | grinding machines | |
| 1,735,867 | Nov. 19, 1929 | F.M. Kern | Grinding Machine | grinding machines | |
| 1,737,852 | Dec. 03, 1929 | F.M. Kern | Centerless Grinding Machine | grinding machines | |
| 1,873,423 | Aug. 23, 1932 | F.M. Kern | Grinding Machine | grinding machines | |