All Patents of Type: electric motors |
Patents 1 -
15
of 954
|
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 |
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 | M.H. Utley, A. Ross | Improvements on electro-magnetic motors | electric motors |
138,855 | May 13, 1873 | S.C. Carter | Electro-Magnetic Motors | electric motors |
171,087 | Dec. 14, 1875 | J. Bishop | Electro Magnetic Engines | electric motors |
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 |
CA-12,341 | Feb. 10, 1881 | E.J. Houston, E. Thomson | Improvements on automatic adjusters for commutator brushes of dynamo-electric machines | motor brushes |
248,435 | Oct. 18, 1881 | T.A. Edison | Utilizing Electricity as Motive Power | DC motors |