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| Patents for Robert W. Aitken | |||||
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| Picture | Number | Date | Patentee | Title | |
| 197,076 | Nov. 13, 1877 | R.W. Aitken | Balanced-Valve | ||
| 204,649 | Jun. 11, 1878 | R.W. Aitken | Piston-Valve for Engines | ||
| 257,994 | May 16, 1882 | D. Farquhar, R.W. Aitken | Valve Gear for Steam Engines | ||
| 288,753 | Nov. 20, 1883 | R.W. Aitken | Brake for Traction Engines | ||
| 303,785 | Aug. 19, 1884 | R.W. Aitken | Valve Gear for Engines | ||
| 344,071 | Jun. 22, 1886 | R.W. Aitken | Steam Boiler | ||
 | 425,119 | Apr. 08, 1890 | R.W. Aitken | Connecting Rod | |