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| All Patents in class 475/224 | |||||
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| Number | Date | Patentee | Title | Type | |
| 277,784 | May 15, 1883 | A.O. Frick, I.G. Rider, W.H. Snyder | Traction-engine | steam traction engines | |
| 2,742,797 | Apr. 24, 1956 | J.A. Perham | Multi-spindle portable power-operated tool | ||