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| All Patents in class 15/257.076 | |||||
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| Number | Date | Patentee | Title | Type | |
| 49,093 | Aug. 01, 1865 | S. Darling | inkstand | draftsman | |
| 51,931 | Jan. 09, 1866 | S. Darling | Inkstand | draftsman | |
| RE4,197 | Dec. 13, 1870 | S. Darling | Improvment in Inkstands | draftsman | |
| RE7,127 | May 23, 1876 | S. Darling | Improvment in Inkstands | draftsman | |