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| All Patents of Type: valve turning tools | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,086,722 | Jul. 13, 1937 | C.J. Matuella | Valve Turning Tool | valve turning tools | |
| 2,476,608 | Jul. 19, 1949 | J.M. Kinsey | Gate Box Turning Tool | valve turning tools | |
| 2,539,262 | Jan. 23, 1951 | A.H. Moore | Valve Turning Tool | valve turning tools | |