| All Patents in class 91/37 |
Patents 1 -
10
of 37
      |
| Picture | Number | Date | Patentee | Title |
| | 627,385 | Jun. 20, 1899 | J. Brockie | Automatic Lathe |
| | 1,840,231 | Jan. 05, 1932 | F.S. Haas, R.E. Harrison | Grinding Machine |
| | 1,952,230 | Mar. 27, 1934 | G.V. Anderson | Automatic Profile Milling Machine |
| | 1,997,892 | Apr. 16, 1935 | E.L. Wall | Duplicating Machine |
| | 2,016,931 | Oct. 08, 1935 | C.C. Richard | Hydraulic Mechanism for Determining the Path of Movement of a Tool or Other Element |
| | 2,101,712 | Dec. 07, 1937 | E.K. Johansen | Tracer Mechanism for Duplicating Machines |
| | 2,154,718 | Apr. 18, 1939 | T.W. Bannon | Duplicating Machine |
| | 2,412,549 | Dec. 10, 1946 | T.S. Armandroff, E.W. Yates | Automatic Pattern Controlled Milling Machine |
| | 2,464,626 | Mar. 15, 1949 | A.P. Waterson | Pilot Operated Servo Valve |
| | 2,473,572 | Jun. 21, 1949 | E.A. Ruchty, N.D. Cooper | Magnetic Servo Operator |
