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| Patents for Alexander Chisholm | |||||
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| Number | Date | Patentee | Title | Type | |
| NS-13 | Jul. 12, 1851 | A. Chisholm | Mathematical mechanical scale to solve problems in trigonometry | scales | |
| NS-14 | Jul. 12, 1851 | A. Chisholm | Improved spirit level | spirit levels | |