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| All Patents in class 15/218.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 67,169 | Jul. 30, 1867 | C.F. Dean | Knife Cleaner | knife cleaners | |
| 1,252,316 | Jan. 01, 1918 | H.W. Bascom | Knife Cleaner | cutler | |