| All Patents in class 451/335 |
Patents 31 -
39
of 39
      |
| Number | Date | Patentee | Title | Type |
| 2,059,895 | Nov. 03, 1936 | C.H. Norton, A.G. Belden | Grinding machine | cylindrical grinders |
| 2,161,465 | Jun. 06, 1939 | F.S. Haas | Grinding Machine | grinding machines |
| 2,454,916 | Nov. 30, 1948 | R.M. Gamble | Machine Tool | thread grinders |
| 2,478,562 | Aug. 09, 1949 | F.S. Haas, G.W. Binns | Grinding Machine | cylindrical grinders |
| 2,571,904 | Oct. 16, 1951 | C.O. Lofgren | Broaching machine | broaching machines |
| 2,990,656 | Jul. 04, 1961 | A.H. Tompkins | Automatically operable centerless grinder | centerless grinders |
| 3,008,382 | Nov. 14, 1961 | T.E. Crawford, E.H. Hawley | Machine Tool | milling machines |
| 3,222,825 | Dec. 14, 1965 | W.B. Seidel | Machine Tool with Workpiece Transporting Headstock | workpiece changers and storage mechanisms |
| 5,367,836 | Nov. 29, 1994 | K.H. Allen | Automatic Drill Loader | tool changers and storage mechanisms |
