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| Patent US474,531 | |||||
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| Number | Date | Patentee | Title | Type | |
| 474,531 | May 10, 1892 | C. Salomon | Process of Roasting Coffee | roasting coffee | |
| GB-474,531 | Nov. 03, 1937 | G. Feather | Improvements relating to radial arm drilling machines | radial drill presses | |