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| All Patents in class 72/340 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 536,301 | Mar. 26, 1895 | J.C. Speirs | Method of Making Wrenches | |
| 832,380 | Oct. 02, 1906 | J. Hartness | Tap and Process of Making the Same | ||
 | 849,329 | Apr. 02, 1907 | W.U. Colthar | Manufacture of cutting-disks | |
 | 1,139,392 | May 11, 1915 | G.A. Wood | Process For Making Hand Tools | |
| 2,206,292 | Jul. 02, 1940 | B.F. Rosenberg | Method of Making a Drill Sleeve | ||
| 3,262,300 | Jul. 26, 1966 | C.W. Kaesemeyer | Process and Tool for Precision Slot Finishing | ||