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| Patents for John B. Jacobs | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 59,552 | Nov. 13, 1866 | J. Burt | Improvement in turning-lathes | |
![]() | 66,946 | Jul. 23, 1867 | A.M. Miller, J. Burt | Improvement in Trial Squares | |