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| Patents for Robert S. McConnell | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,878,763 | Sep. 20, 1932 | H. Henz, R.S. McConnell, H.H. Dovell | Grinding wheel dresser | ||
| 3,039,451 | Jun. 19, 1962 | R.S. McConnell | Grinding wheel dressers | ||
| CA-671,558 | Oct. 01, 1963 | R.S. McConnell | Grinding wheel dressers | ||