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