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| Patents for Hill & Adams | |||||
| Number | Date | Patentee | Title | Type | |
| 18,282 | Sep. 29, 1857 | B.B. Hill | Bit-holder | corner braces | |
| 19,028 | Jan. 05, 1858 | B.B. Hill, S.W. Adams | Bit-holder | corner braces | |