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| All Patents in class 33/501.15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,057,970 | Oct. 20, 1936 | H. Pelphrey | Lead Checking Device for Globoidal Worms | gear measuring machines | |
| 2,529,931 | Nov. 14, 1950 | J.F. Gallup, Sr. | Auxilary Contact for Calipers | measurement gauges | |
| 3,195,239 | Jul. 20, 1965 | W.B. McCardell | Gear Tooth Checking System | gear measuring machines | |