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| Patents for Robert H. Boyd | |||||
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| Number | Date | Patentee | Title | Type | |
| 47,812 | May 23, 1865 | W.W. Grier, R.H. Boyd | Improved drill-bit | drill bits | |
| RE2,712 | Aug. 06, 1867 | R.H. Boyd, W.W. Grier | Improved Machine for Making Augers | making drills and augers | |