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| Patents for D. M. Ball | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,153,181 | Sep. 07, 1915 | G.F. Steedman | Air-drier | air compressors | |
| 1,162,262 | Nov. 30, 1915 | G.F. Steedman | Lubricating apparatus for compressors and similar machines | air compressors | |