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| Patents for Frank Cronin | |||||
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| Number | Date | Patentee | Title | Type | |
| 330,774 | Nov. 17, 1885 | F. Cronin | Ratcheting Auger Handle | auger handles | |
| 629,539 | Jul. 25, 1899 | J. Bertram | Boring and excavating implement | ||
| 912,063 | Feb. 09, 1909 | H. Bertram | Metal-planer | metal planers | |
| CA-117,209 | Mar. 16, 1909 | H. Bertram | Metal planer | metal planers | |