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| All Patents in class 137/243 | |||||
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| Number | Date | Patentee | Title | Type | |
| 913,085 | Feb. 23, 1909 | T.B. Williams | Machine for facing valves, &c. | automotive tools | |
| 1,113,674 | Oct. 13, 1914 | H. Moore | Valve Reseater | valve reseating machines | |