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| Patents for American Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,208,406 | Dec. 12, 1916 | C.O. Throp | Valve Remover | valve spring tools | |
| 1,234,967 | Jul. 31, 1917 | C.O. Throp | Valve Removing Tool | valve spring tools | |
| 2,751,945 | Jun. 26, 1956 | R.W. Beach | Router guide mechanism | handheld power tools | |