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| All Patents of Type: valve facing tool | |||||
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| Number | Date | Patentee | Title | Type | |
| 89,184 | Apr. 20, 1869 | W. Tweedle | Making Gas and Water Cocks | valve facing tool | |
| 216,966 | Jul. 01, 1879 | G.L. Miller | Machine for Trimming Circular Valves | valve facing tool | |
| 1,707,670 | Apr. 02, 1929 | A.C. Savidge | Valve Facing Tool | valve facing tool | |