| All Patents in class 451/400 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 222,901 | Dec. 23, 1879 | H.C. Heckendorn | Improvement in oval-lathes | wood lathes |
| 1,674,973 | Jun. 26, 1928 | C.F. Clark, A.L. Kline | Grinding Machine | internal grinders |
| 2,392,651 | Jan. 08, 1946 | L.M. Davis | Work Supporting and Moving Mechanism | metalworking machine mechanisms |
| 2,418,223 | Apr. 01, 1947 | R.E. Flanders | Work Supporting and Moving Mechanism | workpiece changers and storage mechanisms |
| 2,456,060 | Dec. 14, 1948 | C.G. Pardee, J.H. Hoern | Rotor Grinder | cylindrical grinders |
