| All Patents in class 451/181 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 899,536 | Sep. 29, 1908 | H.W. Jacobs | Machine for Turning Cranked Axles | axle cutters and threaders |
| 1,372,075 | Mar. 22, 1921 | L.J. Kirchenbauer | Crank Pin Lathe | crank pin lathes |
| 1,462,979 | Jul. 24, 1923 | A.S. Weston, F. Petersen | Combined Crank Shaft Turning Tool and Automatically Reciprocating Mechanism for Supporting and Operating the Same | lathe tools |
| 1,744,886 | Jan. 28, 1930 | W.F. Groene | Lapping machine | lapping machines |
| 2,171,417 | Aug. 29, 1939 | E.M. McGovern, P. Schrick | Crankshaft grinding tool | automotive tools |
| 2,179,465 | Nov. 07, 1939 | J.Y. Blazek | Crankshaft grinder | vehicle mechanic |
| 2,195,493 | Apr. 02, 1940 | E.M. McGovern, P. Schrick | Crankshaft grinder | crankshaft maintenance |
