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| Patents for H. A. Curtis | |||||
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| Number | Date | Patentee | Title | Type | |
| 598,319 | Feb. 01, 1898 | A.P. Joy | Wrench | axle nut wrenches | |
| CA-62,998 | Apr. 27, 1899 | A.P. Joy | Improvments in Adjustable Screw-Wrenches | axle nut wrenches | |