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| All Patents in class 475/290 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,095,207 | Oct. 05, 1937 | J.M. Walter | Planetary gearing | milling machines | |
| 2,215,627 | Sep. 24, 1940 | J.M. Walter | Machine tool drive | milling machines | |
| 2,848,908 | Aug. 26, 1958 | J.C. Hollis | Planetary Speed Change Transmission | metalworking power transmission | |