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| Patents for Granville W. Pittman | |||||
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| Number | Date | Patentee | Title | Type | |
| 277,158 | May 08, 1883 | G.W. Pittman | Bench Vise | bench vises | |
| 286,842 | Oct. 16, 1883 | G.W. Pittman | Wrench | quick adjust wrenches | |