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| All Patents in class 451/348 | |||||
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| Number | Date | Patentee | Title | Type | |
| 683,554 | Oct. 01, 1901 | H.S. King, I.F. Cuttler | Apparatus for Truing up Wheels of Tram or Like Cars | portable turning tools | |
| 1,464,959 | Aug. 14, 1923 | V.M. Tuthill | Grinding-wheel-truing device | ||