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| Patents for John E. Frenning | |||||
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| Number | Date | Patentee | Title | Type | |
| 191,053 | May 22, 1877 | F.K. Hesse | Gage | calipers | |
| 202,105 | Apr. 09, 1878 | P.A. Gladwin | Combination Plane and Tool Handle | combination tools | |