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| All Patents in class 403/2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,502,675 | Jul. 29, 1924 | H.L. Johnston | Grinder for coffee and the like | coffee mills | |
| 5,848,947 | Dec. 15, 1998 | R.A. Reinke, M.G. Brosier, D.L. Fornasiere | Split Power Transfer Member | metalworking power transmission | |