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| All Patents in class 369/71 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,256,034 | Feb. 12, 1918 | H.L. Notter | Needle Sharpener | ||
| 1,256,646 | Feb. 19, 1918 | C.J. Barry | Grinding and Polishing Machine | polishing and buffing machinery | |