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| Patents for I. Knight | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 198,777 | Jan. 01, 1878 | W.T. Nicholson | File Handle | |
 | 200,218 | Feb. 12, 1878 | W.T. Nicholson | File Cleaner | |
 | 265,975 | Oct. 17, 1882 | W.T. Nicholson | Forming Teeth Upon File Banks and Apparatus Therefor | |
 | 265,976 | Oct. 17, 1882 | W.T. Nicholson | Machine for Forming Teeth Upon File-Blanks | |