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| Patents for David K. Kraatz | |||||
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| Number | Date | Patentee | Title | Type | |
| 20,921 | Jul. 13, 1858 | D.K. Kraatz | Turbine Water Wheel | turbine water wheels | |
| RE3,875 | Mar. 08, 1870 | D.K. Kraatz | Turbine Water Wheel | turbine water wheels | |