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| Patents for William Lang | |||||
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| Number | Date | Patentee | Title | Type | |
| 268,107 | Nov. 28, 1882 | W. Lang | Speed Indicator | measurement gauges | |
| 527,207 | Oct. 09, 1894 | W. Lang | Speed Measure for Shafting | measurement gauges | |
| 734,738 | Jul. 28, 1903 | A.T. Nelson | Hammer for Tinner's Use | tinsmith | |