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| Patents for J. B. Lapsley | |||||
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| Number | Date | Patentee | Title | Type | |
| 360,836 | Apr. 05, 1887 | W.A. Wright | Extension Leveling Rod | surveying apparatus | |
| 360,837 | Apr. 05, 1887 | W.A. Wright | Leveling Instument | surveying apparatus | |