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| All Patents in class 200/15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,116,552 | Nov. 10, 1914 | C.H. Bissell | Motor-starting switch | electric switches | |
| 1,161,752 | Nov. 23, 1915 | G.B. Thomas | Electric switch | electric switches | |
| 1,180,680 | Apr. 25, 1916 | O.S. Walker | Apparatus for Controlling Magnetic Chucks | magnetic chucks | |
| 1,573,904 | Feb. 23, 1926 | C.N. Bergmann | Switch-actuating mechanism | electric switches | |
| 1,853,642 | Apr. 12, 1932 | F.L. Simmons | Surge Control for Magnetic Chucks | magnetic chuck accessories | |