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| All Patents in class 411/348 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,509,857 | Sep. 30, 1924 | E.W. Zeh | Lock for clutch striking pins and the like | ||
| 8,720,874 | May 13, 2014 | S.J. Tschida, D.L. Schmidt | Ball actuated lock pin | ||