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| All Patents in class 475/158 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,095,207 | Oct. 05, 1937 | J.M. Walter | Planetary gearing | |
| 2,203,743 | Jun. 11, 1940 | F.A. Parsons | Machine Tool Transmission and control | ||