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| Patents for Henry E. Warren | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,114,077 | Oct. 20, 1914 | H.E. Warren | High-pressure prime mover | water power | |
| 1,244,664 | Oct. 30, 1917 | H.E. Warren | Fluid-operated lathe | metal lathes | |
| 1,282,152 | Oct. 22, 1918 | H.E. Warren | Fluid-operated lathe | metal lathes | |
| 1,334,335 | Mar. 23, 1920 | W.M. Wheildon, H.E. Warren | Apparatus for treating metal objects | metal lathes | |