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| Patents for James Robertson | |||||
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| Picture | Number | Date | Patentee | Title | |
| 106,078 | Aug. 02, 1870 | J. Robertson | Direct Acting Engine | ||
 | CA-43,123 | Jun. 03, 1893 | A.B. Ruud, H.R. Neilson, J. Robertson | Combined Axle Nut Wrench and Wheel Lifter For the Lubrication of Axles | |
 | 500,950 | Jul. 04, 1893 | J. Robertson | Combined Wrench And Wheel Lifter | |
 | 552,343 | Dec. 31, 1895 | J.D. White | Wrench | |