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| All Patents in class 415/200 | |||||
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| Number | Date | Patentee | Title | Type | |
| 925,218 | Jun. 15, 1909 | J.P. Nikonow | Elastic Fluid Turbine | steam turbines | |
| 1,584,944 | May 18, 1926 | A.J. Johnson | Blower construction | handheld power blowers | |