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| All Patents in class 248/611 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,823,533 | Sep. 15, 1931 | F. Diehl | Phonograph turntable | ||
| 1,823,555 | Sep. 15, 1931 | J.M. Naul | Electric phonograph motor | ||