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| Patents for Henry D. Hirst | |||||
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| Number | Date | Patentee | Title | Type | |
| 141,347 | Jul. 29, 1873 | D. Heer | Improvement in lathes | wood lathes | |
| RE7,535 | Feb. 27, 1877 | D. Heer | Spiral-cutting lathe | wood lathes | |