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| Patents for Henry A. Chapin | |||||
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| Number | Date | Patentee | Title | Type | |
| 15,219 | Jul. 01, 1856 | H.A. Chapin | Tapping Gas Fittings | tapping machines | |
| 244,438 | Jul. 19, 1881 | C.E. Dodge | Machine and Device for End Shaking Watch Trains | watchmaking machinery | |