| All Patents in class 451/181 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 899,536 | Sep. 29, 1908 | H.W. Jacobs | Machine for Turning Cranked Axles |
| | 1,372,075 | Mar. 22, 1921 | L.J. Kirchenbauer | Crank Pin Lathe |
| | 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 |
 | 1,744,886 | Jan. 28, 1930 | W.F. Groene | Lapping machine |
| | 2,171,417 | Aug. 29, 1939 | E.M. McGovern, P. Schrick | Crankshaft grinding tool |
| | 2,179,465 | Nov. 07, 1939 | J.Y. Blazek | Crankshaft grinder |
| | 2,195,493 | Apr. 02, 1940 | E.M. McGovern, P. Schrick | Crankshaft grinder |
