| All Patents of Type: electrical devices |
Patents 1 -
15
of 55
      |
| Number | Date | Patentee | Title | Type |
| 159,028 | Jan. 26, 1875 | G.F. Green | Improvement in electro-magnetic dental tools | electrical devices |
| 372,012 | Oct. 25, 1887 | I.W. Colburn | Electrical resistance-board | electrical devices |
| 413,292 | Oct. 22, 1889 | E. Thomson | Electric measuring-instrument | electrical devices |
| 442,705 | Dec. 16, 1890 | A.W. Meston | Electric meter | electrical devices |
| 444,245 | Jan. 06, 1891 | A. Hormel | Electric annunciator | electrical devices |
| 470,204 | Mar. 08, 1892 | C.R. Meston, A.W. Meston | Electric cut-out and safety device | electrical devices |
| CA-39,585 | Jul. 30, 1892 | M. von Dolivo-Dobrowolsky | Electric transformer | electrical devices |
| 505,541 | Sep. 26, 1893 | G.S. Strong | Forging and bending die | electrical devices |
| 530,597 | Dec. 11, 1894 | A.W. Meston | Alternating-current transformer | electrical devices |
| 549,449 | Nov. 05, 1895 | M. von Dolivo-Dobrowolsky | Apparatus for indicating difference of phase | electrical devices |
| 556,646 | Mar. 17, 1896 | C.F. Scott, C.E. Skinner | Device for detecting short circuits | electrical devices |
| 626,927 | Jun. 13, 1899 | C.C. Perkins | Incandescent-lamp socket | electrical devices |
| 628,957 | Jul. 18, 1899 | J.W. Packard | Electric transformer | electrical devices |
| 829,974 | Sep. 04, 1906 | J.C. Lincoln | Electrically Operated Mine Door Actuating Mechanism | electrical devices |
| 838,547 | Dec. 18, 1906 | A. Kimble | Electric motor and method of controlling the same | electric motors |
