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| Patents for David Lippy | |||||
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| Number | Date | Patentee | Title | Type | |
| 230,297 | Jul. 20, 1880 | J.B. Roush, D. Lippy | Traction Engine | steam traction engines | |
| 261,005 | Jul. 11, 1882 | J. Hughes, D. Lippy | Traction Engine | steam traction engines | |
| 272,447 | Feb. 20, 1883 | J. Hughes, D. Lippy | Traction Engine | steam traction engines | |