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| Patents for D. Rowland | |||||
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| Number | Date | Patentee | Title | Type | |
| 35,983 | Jul. 22, 1862 | S. Kingsland | Improved wood-bending machine | wood bending machines | |
| 36,312 | Aug. 26, 1862 | E. Thayer | Plane Angulometer | inclinometers | |
| 39,113 | Jul. 07, 1863 | B.F. Betts | Improved machine for cutting thin lumber | wood slicing machines | |