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| Patents for Edw. H. Downs | |||||
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| Number | Date | Patentee | Title | Type | |
| 277,430 | May 08, 1883 | A.J. Smart | Tap Wrench | tap wrenches and die stocks | |
| 298,248 | May 06, 1884 | A.J. Smart | Combined Drill and Countersink | countersinks | |
| 303,053 | Aug. 05, 1884 | C.P. Russell | Combined Drill and Countersink | countersinks | |
| 303,060 | Aug. 05, 1884 | A.J. Smart | Screw Cutting Die | taps and dies | |
| 306,783 | Oct. 21, 1884 | A.J. Smart | Screw Cutting Die | taps and dies | |