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| Patents for John Hartman Jr. | |||||
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| Number | Date | Patentee | Title | Type | |
| 21,469 | Sep. 07, 1858 | J. Hartman, Jr. | Couch-Seat for Railroad-Cars | ||
| 205,081 | Jun. 18, 1878 | J. Hartman, Jr. | Pipe-Wrench | alligator wrenches | |