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| Patents for E. K. Steward | |||||
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| Number | Date | Patentee | Title | Type | |
| 720,993 | Feb. 17, 1903 | A.D. Allen | Rotary Engine | rotary steam engines | |
| 730,407 | Jun. 09, 1903 | S.D. Shriver | Butt Gage | butt gauges | |