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| Patents for Stephen Ambrose Morse | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 38,119 | Apr. 07, 1863 | S.A. Morse | Twist drill bit | |
 | 42,592 | May 03, 1864 | S.A. Morse | Improved collet | |
 | 104,982 | Jul. 05, 1870 | S.A. Morse | Improvement in grinding-rest for twist-drills | |