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| Patents for Jas. A. Koehl | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 751,055 | Feb. 02, 1904 | C. Contal | Ratchet Screw Key | |
 | 757,613 | Apr. 19, 1904 | W.E. Gilliland | Nut Wrench | |
 | 793,201 | Jun. 27, 1905 | E. Kritzer | Wrench | |
 | 794,175 | Jul. 11, 1905 | A.P. Hall | Adjustable Level and Incinometer | |