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| All Patents in class 384/473 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,170,036 | Aug. 22, 1939 | R. Schumann | Small electric machine tool | handheld power tools | |
| 3,420,590 | Jan. 07, 1969 | G.A. Bilocq | Dustproof bearing for idler roller | ||