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| All Patents in class 362/261 | |||||
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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 | |
| 685,426 | Oct. 29, 1901 | J.A. Mosher | Electric Arc Lamp | electric arc lamps | |