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| Patents for John O. Seifert | |||||
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| Number | Date | Patentee | Title | Type | |
| 614,502 | Nov. 22, 1898 | F.H. Richards | Shaft-coupling | industrial machine shaft couplings | |
| 842,453 | Jan. 29, 1907 | E.W. Foster | Turn table plane | bench planes | |
| 858,671 | Jul. 02, 1907 | F.H. Richards | Automatically-fed machine | woodworking machine stockfeeding mechanisms | |
| 919,769 | Apr. 27, 1909 | F.H. Richards | Carving machine | carving machines | |