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| All Patents in class 30/457 | |||||
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| Number | Date | Patentee | Title | Type | |
| 471,435 | Mar. 22, 1892 | O.H. Robinson | Pencil Sharpener | pencil sharpeners | |
| 776,554 | Dec. 06, 1904 | R.F. Scott | Lathe | metal lathes | |