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| All Patents in class 33/501.19 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,006,161 | Jun. 25, 1935 | J.C. Drader | Checking Fixture | gear measuring machines | |
| 2,318,970 | May 11, 1943 | G.O. Richmond | Apparatus for Testing Gears | measurement gauges | |
| 2,540,961 | Feb. 06, 1951 | J.J. Osplack | Pivot arm gear rolling fixture | gear making machines | |
| 2,612,701 | Oct. 07, 1952 | G.C. Razor | Gear Tooth Lead Testing Device | gear measuring machines | |
| 2,689,410 | Sep. 21, 1954 | C.B. Stapleton, A.S. Beam | Bevel gear checking master | measuring tools | |