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| All Patents in class 72/250 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 432,635 | Jul. 22, 1890 | S. Moore | Machine for Making Twist Drills | |
| 1,719,230 | Jul. 02, 1929 | C.D. McDonald | Thread-rolling machine | ||
| 3,138,982 | Jun. 30, 1964 | C.L. Sporck | Strip Rolling Method | ||
| 3,406,553 | Oct. 22, 1968 | J. Gross, J.J. Hiegel | Clamping and sticking guide | ||