| All Patents of Type: electrical devices |
Patents 1 -
15
of 829
      |
| Number | Date | Patentee | Title | Type |
| 8,736X | Mar. 31, 1835 | D. Harrington | Galvanic electricity applied to cure diseases | electric batteries |
| 132 | Feb. 25, 1837 | T. Davenport | Improvement in propelling machinery by magnetism and electro-magnetism | DC motors |
| 26,558 | Dec. 27, 1859 | G.W. Beardslee | Improved magneto-electric machine | electric motors |
| 96,332 | Nov. 02, 1869 | G. Little | Improvement in Electro-Magnetic Motors | electric motors |
| CA-686 | Nov. 05, 1870 | H. Wood | Improvement in electro magnetic machines and magnets | electric motors |
| CA-919 | Apr. 11, 1871 | A. Ross, M.H. Utley | Improvements on electro-magnetic motors | electric motors |
| 138,855 | May 13, 1873 | S.C. Carter | Electro-Magnetic Motors | electric motors |
| 159,028 | Jan. 26, 1875 | G.F. Green | Improvement in electro-magnetic dental tools | electrical devices |
| 171,087 | Dec. 14, 1875 | J. Bishop | Electro Magnetic Engines | electric motors |
| 200,032 | Feb. 05, 1878 | T.A. Edison | Synchronous Movements for Electric Telegraphs | telegraphic apparatus |
| 227,622 | May 18, 1880 | W.W. Griscom | Electro-Magnetic Motor | DC motors |
| 227,623 | May 18, 1880 | W.W. Griscom | Electro-Magnetic Motor | DC motors |
| 227,845 | May 18, 1880 | W. Sawyer | Dynamo Electric Machine | DC motors |
| 228,888 | Jun. 15, 1880 | W.W. Griscom | Regulating Electro-Magnetic Motors | motor regulators |
| 238,631 | Mar. 08, 1881 | C.E. Ball | Dynamo or Magneto-Electric Machine | electric generators |
