| All Patents in class 29/38E |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 2,033,686 | Mar. 10, 1936 | F.M. Davis | Multiple operation machine |
| | 2,126,462 | Aug. 09, 1938 | E.R. Shipley, W.L. Groene | Orbital Broaching Lathe |
 | 2,138,522 | Nov. 29, 1938 | W.F. Groene, W.R. Meyer | Four-spindle drum type crankshaft lathe |
| | 2,156,153 | Apr. 25, 1939 | W.R. Meyer, H.J. Siekmann, W.F. Groene | Multiple Spindle Vertical Crankshaft Lathe |
| | 2,174,084 | Sep. 26, 1939 | W.L. Groene | Station Type Pin and Line Bearing Lathe |
| | 2,291,035 | Jul. 28, 1942 | W.L. Groene | Multiple Spindle Indexing Crank Pin Lathe |
 | 2,330,968 | Oct. 05, 1943 | H.J. Siekmann, W.F. Groene | Multiple Spindle Broaching Lathe Indexing Mechanism |
