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| All Patents in class 81/32 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,441,930 | Jan. 09, 1923 | V.T. Julin | Ratchet Gimlet | gimlets | |
| 2,485,991 | Oct. 25, 1949 | A.L. Stowell | Ratchet end for brace bits | ratchet braces | |