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| All Patents in class 29/888.43 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,910,767 | May 23, 1933 | J.H. Hoern | Method of making tappets | gas and gasoline engines | |
| 2,265,561 | Dec. 09, 1941 | J.H. Hoern | Method of Making Valve Tappets | internal combustion engines | |