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| All Patents in class 81/158 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,404,445 | Jan. 24, 1922 | K. Kissendorfer | Shifting Spanner | quick adjust wrenches | |
| 1,752,430 | Apr. 01, 1930 | C.B. Gartrell | Wrench | screw adjust wrenches | |
| 2,490,307 | Dec. 06, 1949 | M.J. Karr | Stop device for machine tools | drill presses | |