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| All Patents in class 403/297 | |||||
| Picture | Number | Date | Patentee | Title | |
| 1,060,543 | Apr. 29, 1913 | C.E. Evans | Dowel | ||
![]() | 2,008,352 | Jul. 16, 1935 | G.O. Leopold, T.J. Fegley | coupling device for impact tips | |
![]() | 4,364,695 | Dec. 21, 1982 | J.O. Lenz | Carving machine with auxiliary frame | |