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| Patents for Langdon Mitre-Box Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 45,055 | Nov. 15, 1864 | L.W. Langdon | Improvement in miter-boxes | miter boxes | |
| 151,139 | May 19, 1874 | L.W. Langdon | Improvement in miter-boxes | miter boxes | |
| 152,529 | Jun. 30, 1874 | A.F. Strong | Improvement in miter-boxes | miter boxes | |