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All Patents in class 439
Patents 1 - 15 of 28
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NumberDatePatenteeTitleType
RE200May 13, 1851G.H. CorlissImprovements in Cut-Off and Working the Valves of Steam Engines steam engines
307,166Oct. 28, 1884J.W. BensonIncandescent electric lamp
397,424Feb. 05, 1889H.N. Weidner, W.W. GriscomConnection of Electrical Circuitselectrical connectors
543,654Jul. 30, 1895F.B. RaeElectric Soldering Ironsoldering irons
626,927Jun. 13, 1899C.C. PerkinsIncandescent-lamp socketelectrical devices
685,012Oct. 22, 1901N. TeslaMeans for Increasing the Intensity of Electrical Oscillations
714,811Dec. 02, 1902W.D. LitchfieldBrush-holdermotor brush holders
866,667Sep. 24, 1907E. MattmanMeans for fastening collector-leadselectric motors
959,634May 31, 1910S. SparrowBrush or collector for electrical machinesmotor brushes
1,000,101Aug. 08, 1911G.C. MarxElectrical attachment-plug
1,031,337Jul. 02, 1912G.J. HartmannFeed-wire connection for electric motorshandheld drills
1,108,940Sep. 01, 1914C.W. StarkerCollector-ringinduction motors
1,550,450Aug. 18, 1925W.V. OrrElectric connectionelectrical devices
1,574,020Feb. 23, 1926S.D. Black, A.G. DeckerElectric-cord protectorhandheld drills
1,690,118Nov. 06, 1928F.G. JulyanBattery connecterelectric batteries
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