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| Patents for James Harper | |||||
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| Number | Date | Patentee | Title | Type | |
| 119,269 | Sep. 26, 1871 | J. Harper | Improvement in Lubricators for Steam Engines | steam engine lubricators | |
| 121,779 | Dec. 12, 1871 | J. Harper | Improvement in Lubricators for Steam-Engines | steam engine lubricators | |
| 755,518 | Mar. 22, 1904 | G. Moore | Wrench | screw adjust wrenches | |