| All Patents in class 439 |
Patents 1 -
15
of 45
      |
| Number | Date | Patentee | Title | Type |
| RE200 | May 13, 1851 | G.H. Corliss | Improvements in Cut-Off and Working the Valves of Steam Engines | steam engines |
| 307,166 | Oct. 28, 1884 | J.W. Benson | Incandescent electric lamp | |
| 397,424 | Feb. 05, 1889 | H.N. Weidner, W.W. Griscom | Connection of Electrical Circuits | electrical connectors |
| 543,654 | Jul. 30, 1895 | F.B. Rae | Electric Soldering Iron | soldering irons |
| 626,927 | Jun. 13, 1899 | C.C. Perkins | Incandescent-lamp socket | electrical devices |
| 685,012 | Oct. 22, 1901 | N. Tesla | Means for Increasing the Intensity of Electrical Oscillations | |
| 714,811 | Dec. 02, 1902 | W.D. Litchfield | Brush-holder | motor brush holders |
| 866,667 | Sep. 24, 1907 | E. Mattman | Means for fastening collector-leads | electric motors |
| 959,634 | May 31, 1910 | S. Sparrow | Brush or collector for electrical machines | motor brushes |
| 1,000,101 | Aug. 08, 1911 | G.C. Marx | Electrical attachment-plug | |
| 1,031,337 | Jul. 02, 1912 | G.J. Hartmann | Feed-wire connection for electric motors | handheld power drills |
| 1,108,940 | Sep. 01, 1914 | C.W. Starker | Collector-ring | induction motors |
| 1,457,570 | Jun. 05, 1923 | E.C. Guthard | Tool Handle and the Like | wrench handle components |
| 1,550,450 | Aug. 18, 1925 | W.V. Orr | Electric connection | electrical devices |
| 1,574,020 | Feb. 23, 1926 | S.D. Black, A.G. Decker | Electric-cord protector | handheld power drills |
