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| Patents for Hamilton Bates | |||||
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| Number | Date | Patentee | Title | Type | |
| 92,419 | Jul. 13, 1869 | H. Bates, D.L. Bates | Improved drill | drill presses | |
| 117,896 | Aug. 08, 1871 | J. Lemman | Improvement in drilling-machines | drill presses | |