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| Patents for Chs. Houghton | |||||
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| Number | Date | Patentee | Title | Type | |
| RE9,183 | May 04, 1880 | O.R. Chaplin | Combined Square and Bevel | bevel squares | |
| 307,413 | Oct. 28, 1884 | H.A. Rueter | Wrench | wrenches | |