| All Patents in class 310 |
Patents 1 -
15
of 1019
      |
| Number | Date | Patentee | Title | Type |
| 132 | Feb. 25, 1837 | T. Davenport | Improvement in propelling machinery by magnetism and electro-magnetism | DC motors |
| 809 | Jun. 27, 1838 | N. Walkly | Improved mode of changing the poles of electro-magnets | electric motors |
| 910 | Sep. 08, 1838 | S. Stimpson | Improved apparatus for the application of electro-magnetism as a motive power | electric motors |
| 10,940 | May 16, 1854 | P.B. Tyler | Method of nibbing saw-teeth | sawblades |
| 26,558 | Dec. 27, 1859 | G.W. Beardslee | Improved magneto-electric machine | electric motors |
| 46,015 | Jan. 24, 1865 | J.W. Moyer | Improvement in sawing machines | scrollsaws |
| 96,332 | Nov. 02, 1869 | G. Little | Improvement in 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 |
| 174,609 | Mar. 07, 1876 | R. Wright | Improvement in Machines for Bending Tubing | pipe and tube benders |
| 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 |
