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| All Patents in class 200/277 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,772,964 | Aug. 12, 1930 | R.F. Shunk | Handle switch construction | vacuum cleaners | |
| 3,072,768 | Jan. 08, 1963 | R. Happe, J.P. Yelpo | Built-in switch for insulated portable electric tools | handheld power tools | |