| All Patents in class 409/252 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 1,815,647 | Jul. 21, 1931 | L.H. Blood | Broaching Machine |
| | 1,848,044 | Mar. 01, 1932 | L.H. Blood | Broaching Machine |
 | 2,025,070 | Dec. 24, 1935 | E.E. Nygren | Metal cutting machine |
| | 2,072,563 | Mar. 02, 1937 | A.H. Hawley, H.L. Pope, J.E. Lynch | Automatic Multiple Broaching Machine |
| | 2,194,568 | Mar. 26, 1940 | W. Trible, M. Romaine | Broaching Machine |
| | 2,225,731 | Dec. 24, 1940 | W.D. Averill | Broaching Machine |
| | 2,333,337 | Nov. 02, 1943 | C.M. Beach, E.C. Rachrs | Broaching Machine |
| | 2,365,040 | Dec. 12, 1944 | A.L. Hamelberg, W.D. Averill | Broaching Machine |
 | 2,571,904 | Oct. 16, 1951 | C.O. Lofgren | Broaching machine |
