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| All Patents in class 403/145 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 48,327 | Jun. 20, 1865 | J.A. Traut | Improvements in Joints of Folding Rules | |
| 1,975,215 | Oct. 02, 1934 | U.G. Thomas | Tool Holder | ||
| 2,636,759 | Apr. 28, 1953 | T.O. Rueb | Friction Joint | ||