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| Patents for Joseph H. Chadwick | |||||
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| Number | Date | Patentee | Title | Type | |
| 65,173 | May 28, 1867 | S.E. Chubbuck | Improved machine for cutting sheet lead | cutting and trimming machines | |
| 67,721 | Aug. 13, 1867 | S.E. Chubbuck | Improved apparatus for moulding plates of lead | casting molds | |