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| Patents for E. R. Ruppert | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,166,322 | Dec. 28, 1915 | J.J. Brewer | Marking-Gage | clapboard markers | |
| 1,206,164 | Nov. 28, 1916 | J.M. Stryhal | Valve Grinding Tool | valve grinding tools | |
| 1,409,833 | Mar. 14, 1922 | H.A. Cook | Railroad Inclinometer | inclinometers | |