| All Patents in class 340/870.43 |
Patents 1 -
4
of 4
      |
| Number | Date | Patentee | Title | Type |
| 2,228,902 | Jan. 14, 1941 | A. Allen | Automatically Controlled Machine Tool and Follow-Up System | metalworking machine mechanisms |
| 2,473,572 | Jun. 21, 1949 | E.A. Ruchty, N.D. Cooper | Magnetic Servo Operator | metalworking machine mechanisms |
| 3,048,832 | Aug. 07, 1962 | A.O. Fitzner | Position Indicating Means for Machine Tools | machine tool controls |
| 3,239,759 | Mar. 08, 1966 | R.R. O'Hara | Automatic Rebalancing Measuring System Having Auxiliary Actuated Indicator Zero Return Means | scales and balances |
