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| Patents for Henry R. Davis | |||||
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| Picture | Number | Date | Patentee | Title | |
| RE6,443 | May 25, 1875 | S. Darling | Improvment in Inkstands | ||
| RE6,574 | Aug. 03, 1875 | S. Darling | Improvment in Inkstands | ||
 | 235,133 | Dec. 07, 1880 | S. Darling | Micrometer Gage for Wire & Sheet Metal | |
| 369,101 | Aug. 30, 1887 | S. Darling | Inkstand | ||