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| Patents for Johann Martignoni | |||||
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| Picture | Number | Date | Patentee | Title | |
| 270,235 | Jan. 09, 1883 | J. Martignoni | Machine for Cutting Helical Grooves in Twist Drills | ||
| 417,571 | Dec. 17, 1889 | J. Martignoni | Cutter and Holder Therefor | ||
| 495,256 | Apr. 11, 1893 | J. Martignoni | Cutter and Cutter Holder | ||