| All Patents in class 315/223 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 390,710 | Oct. 09, 1888 | H.K. Shanck | Gas Engine |
| | 514,168 | Feb. 06, 1894 | N. Tesla | Means for generating electric currents |
| | 568,177 | Sep. 22, 1896 | N. Tesla | Apparatus for producing ozone |
| | 568,180 | Sep. 22, 1896 | N. Tesla | Apparatus for producing electrical currents of high frequency |
| | 588,629 | Aug. 24, 1897 | L. Bly | Igniter for Explosive Engines |
| | 609,250 | Aug. 16, 1898 | N. Tesla | Electrical Igniter for Gas-Engines |
 | 881,058 | Mar. 03, 1908 | A.N. Classon | Operating mechanism for magnetos |
