| All Patents in class 251/3 |
Patents 1 -
15
of 40
      |
| Number | Date | Patentee | Title | Type |
| 1,952,231 | Mar. 27, 1934 | G.V. Anderson | Milling Machine | milling machines |
| 1,954,442 | Apr. 10, 1934 | H. Ernst, A.H. Dall | Grinding Machine | grinding machines |
| 1,978,389 | Oct. 23, 1934 | H. Ernst, B. Sassen | Automatic Pattern Controlled Milling Machine | milling machines |
| 1,997,890 | Apr. 16, 1935 | E.L. Wall | Universal Tracer | hydraulic apparatus |
| 2,003,557 | Jun. 04, 1935 | B. Sassen | Hydraulically Controlled Automatic Die Sinking Machine | milling machines |
| 2,036,362 | Apr. 07, 1936 | H. Ernst, B. Sassen | Automatic Pattern Controlled Milling Machine | milling machines |
| 2,068,889 | Jan. 26, 1937 | E.G. Roehm | Milling and Profiling Machine | profiling machines |
| 2,083,774 | Jun. 15, 1937 | J.C. Campbell | Sensitive Valve Mechanism | hydraulic apparatus |
| 2,101,712 | Dec. 07, 1937 | E.K. Johansen | Tracer Mechanism for Duplicating Machines | metalworking machine mechanisms |
| 2,111,332 | Mar. 15, 1938 | E.G. Roehm | Multiple Automatic Pattern Controlled Milling Machine | milling machines |
| 2,221,459 | Nov. 12, 1940 | B. Sassen | Manually Controlled Contour Machine | milling machines |
| 2,235,092 | Mar. 18, 1941 | E.L. Wall | Duplicating Machine | milling machines |
| 2,239,625 | Apr. 22, 1941 | H. Fritschi, E.G. Roehm | Profile Milling Machine | milling machines |
| 2,332,532 | Oct. 26, 1943 | E.G. Roehm | Dual Pattern Controlled Machine Tool | milling machines |
| 2,332,533 | Oct. 26, 1943 | E.G. Roehm | Tracer Mechanism | profiling machines |
