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| All Patents in class 475/346 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,848,908 | Aug. 26, 1958 | J.C. Hollis | Planetary Speed Change Transmission | metalworking power transmission | |
| 3,316,772 | May 02, 1967 | G.H. Jones | Multiple Pinion Wound Up Power Drive | horizontal boring mills | |