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| Patents for W. H. Warren Machine Tool Works | |||||
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| Number | Date | Patentee | Title | Type | |
| 116,243 | Jun. 20, 1871 | W.H. Warren | Improvement in Metal Planers | metal planers | |
| 130,258 | Aug. 06, 1872 | W.H. Warren | Improvement in Slotting and Shaping Machines | metal shapers | |
| 453,780 | Jun. 09, 1891 | W.H. Warren | Radial Drilling Machine | radial drill presses | |