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| All Patents in class 29/512 | |||||
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| Number | Date | Patentee | Title | Type | |
| 218,338 | Aug. 05, 1879 | C.N. Thomas | Button Machinery | button making machinery | |
| 1,862,793 | Jun. 14, 1932 | M.C. Dellinger, H.W. Kulp | Valve Spring Lifter | valve spring tools | |
| 2,183,543 | Dec. 19, 1939 | C.W. Cherry | Rivet and Method of Applying the Same | rivets | |