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