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| All Patents of Type: whetstones | |||||
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| Number | Date | Patentee | Title | Type | |
| 220,914 | Oct. 28, 1879 | C.M. Currier | Whetstone Holder | whetstones | |
| 528,772 | Nov. 06, 1894 | R. Dutton | Whetstone | whetstones | |