| All Patents in class 310/27 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 520,810 | Jun. 05, 1894 | E. Thomson | Electric Reciprocating Motor |
| | 680,797 | Aug. 20, 1901 | R.D. Mershon | Electromagnetic Motor or Reciprocating Engine |
 | 894,782 | Jul. 28, 1908 | G.H. Rowe | Rock hammer-drill |
 | 938,708 | Nov. 02, 1909 | G.H. Rowe | Stamp mill |
| | 955,122 | Apr. 19, 1910 | T.F. Baily | Forging Press |
 | 2,761,981 | Sep. 04, 1956 | A. Axelrod | Electro mechanical transducers |
| | 2,896,139 | Jul. 21, 1959 | A. Axelrod | Electromechanical transducer for controlling a tuning condenser in an oscillator circuit |
