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| All Patents in class 416/183 | |||||
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| Number | Date | Patentee | Title | Type | |
| 450,874 | Apr. 21, 1891 | J. Schwarzmann | Rotary Engine | rotary steam engines | |
| 2,480,807 | Aug. 30, 1949 | C.B. De Vlieg | Method and apparatus for making impeller wheels | milling machines | |