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| Patents for D. H. Stephens | |||||
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| Number | Date | Patentee | Title | Type | |
| 59,472 | Nov. 06, 1866 | D.H. Stephens | Improvement in tools for making tenons | tenoning machines | |
| 88,094 | Mar. 23, 1869 | D.H. Stephens | Improved Rule Clamp | clamps | |