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| All Patents in class 475/342 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,789,412 | Jan. 20, 1931 | G.D. Sleeth, H.W. Oster | Portable power-driven tool | handheld power tools | |
| 2,033,749 | Mar. 10, 1936 | J.M. Walter | Milling machine head | milling machines | |