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| Patents for Jas. A. Koehl | |||||
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| Number | Date | Patentee | Title | Type | |
| 751,055 | Feb. 02, 1904 | C. Contal | Ratchet Screw Key | ratchet wrenches | |
| 757,613 | Apr. 19, 1904 | W.E. Gilliland | Nut Wrench | axle nut wrenches that lock nut to wheel hub | |
| 793,201 | Jun. 27, 1905 | E. Kritzer | Wrench | brace wrenches | |
| 794,175 | Jul. 11, 1905 | A.P. Hall | Adjustable Level and Incinometer | inclinometers | |