| All Patents in class 451/399 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 342,895 | Jun. 01, 1886 | W. Beers | Attachment for Lathes for Turning Crank Axles |
 | 945,979 | Jan. 11, 1910 | H.N. Cudworth, J.C. Spence, C.H. Norton | Machine for grinding crankshafts |
 | 1,304,799 | May 27, 1919 | C.H. Norton | Double-head grinding machine |
 | 1,748,672 | Feb. 25, 1930 | W.F. Groene | Chuck in machine tools |
| | 1,932,993 | Oct. 31, 1933 | H.K. Tegarden | Grinding Machine |
| | 1,952,423 | Mar. 27, 1934 | H. Ernst, A.H. Dall | Grinding Machine |
 | 2,250,632 | Jul. 29, 1941 | W.L. Groene | Hydraulic chucking mechanism |
| | 2,429,685 | Oct. 28, 1947 | F.P. Healy | Chuck for crankshaft grinders |
| | 2,484,887 | Oct. 18, 1949 | L.E. Mehlhope, E.J. Riveira, W.A. Hoier | Crankshaft Grinder |
| | 2,961,806 | Nov. 29, 1960 | J.J. Strnad | Automatic counterbalance for crankshaft grinders |
