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| All Patents in class 401/117 | |||||
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| Number | Date | Patentee | Title | Type | |
| 470,777 | Mar. 15, 1892 | C.E. Billings | Multiblade Screwdriver | screwdriver mechanisms | |
| 2,240,992 | May 06, 1941 | J.N. Landau | Fountain pen | ||