| All Patents in class 219/69.16 |
Patents 1 -
6
of 6
      |
| Picture | Number | Date | Patentee | Title |
| | 2,807,706 | Sep. 24, 1957 | J.J. Oezer | Apparatus for Automatic Control of Electrical Discharge Machine |
| | 3,183,397 | May 11, 1965 | R.L. Henry | Motor Control Apparatus |
| | 3,463,896 | Aug. 26, 1969 | R.L. Henry | Electro-Discharge Machining Apparatus |
| | 3,474,216 | Oct. 21, 1969 | J.M. Morgan, Jr. | Process Efficiency Detecting Circuit for Electrical Discharge Machining Apparatus |
| | 3,525,843 | Aug. 25, 1970 | R.F. Batterson | Electrical Discharge Machining Apparatus Having Electrode Feedrate Controlled by Gap With |
 | 3,531,615 | Sep. 29, 1970 | F.X. Zammit | Electrical discharge machining with step driven electrode |
