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| All Patents in class 314/76 | |||||
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| Number | Date | Patentee | Title | Type | |
| 280,426 | Jul. 03, 1883 | W. Wheeler | Focus Regulator for Electric Arc Lamps | electric arc lamps | |
| 1,827,245 | Oct. 13, 1931 | C.C. Peck, J.F. Lincoln | Arc Welding | welding machines | |