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| Patents for F. A. Langworthy | |||||
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| Number | Date | Patentee | Title | Type | |
| 54,010 | Apr. 17, 1866 | C.L. Pierce | Improvement in shingle machines | shingle machines | |
| 60,048 | Nov. 27, 1866 | G. Parr | Improvement in the Manufacture of Cutlery | ||
| 66,343 | Jul. 02, 1867 | H.F. Holt | Shifting Rail | ||