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| Patents for Denver Rock Drill Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,178,892 | Apr. 11, 1916 | D.S. Waugh | Rock Drill | ||
 | 1,253,291 | Jan. 15, 1918 | W.A. Smith | Drill Sharpener | |
 | 1,253,292 | Jan. 15, 1918 | W.A. Smith | Dolly Mechanism for Drill Sharpeners | |
| 1,270,667 | Jun. 25, 1918 | W.A. Smith | Rock Drill Sharpener | ||