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| All Patents in class 200/538 | |||||
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| Number | Date | Patentee | Title | Type | |
| 967,190 | Aug. 16, 1910 | L.A. Hauck | Switch for electric tools | handheld power tools | |
| 1,772,964 | Aug. 12, 1930 | R.F. Shunk | Handle switch construction | vacuum cleaners | |