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| Patents for Herbert C. Warren | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 531,817 | Jan. 01, 1895 | H.C. Warren | Precision-index | |
 | 547,571 | Oct. 08, 1895 | H.C. Warren | Apparatus for cutting gear-teeth | |
 | 559,011 | Apr. 28, 1896 | H.C. Warren | Machine for making spur gears | |
 | 588,738 | Aug. 24, 1897 | H.C. Warren | Machine for generating gear-teeth | |
 | 605,982 | Jun. 21, 1898 | H.C. Warren | Machine for generating gear-teeth | |
 | 605,983 | Jun. 21, 1898 | H.C. Warren | Gear-tooth-generating machines | |
| 673,743 | May 07, 1901 | H.C. Warren | Tool Holder | ||