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| All Patents in class 318/739 | |||||
| Number | Date | Patentee | Title | Type | |
| 390,820 | Oct. 09, 1888 | N. Tesla | Regulator for Alternate-Current Motors | ||
| 2,600,779 | Jun. 17, 1952 | R.N. Knosp, C.E. Linden, F.O. Wetzel | Control mechanism for tapping machines | tapping machines | |
| 2,664,473 | Dec. 29, 1953 | S.S. Brown | Selector switch | electric switches | |
| 2,999,920 | Sep. 12, 1961 | S.S. Brown | Motorized adjustable hospital bed | gear motors | |