| All Patents in class 451/51 |
Patents 1 -
10
of 15
      |
| Picture | Number | Date | Patentee | Title |
 | 72,636 | Dec. 24, 1867 | W.C. Hicks | Grinding and Polishing Concave Surfaces |
| | 1,779,467 | Oct. 28, 1930 | S. Einstein | Process of Grinding |
 | 1,972,316 | Sep. 04, 1934 | C.H. Randolph | Process of and apparatus for grinding internal surfaces of tubes |
| | 2,033,324 | Mar. 10, 1936 | L.F. Nenninger, J.E. Caster | Process of Grinding |
| | 2,167,758 | Aug. 01, 1939 | W.M. Fairbairn, A.M. Johnson | Method and machine for honing cylindrical surfaces |
| | 2,315,794 | Apr. 06, 1943 | A.M. Johnson | Method of and apparatus for honing |
| | 2,345,581 | Apr. 04, 1944 | H.J. Caldwell | Machine tool |
| | 2,377,310 | Jun. 05, 1945 | H.J. Caldwell, E.Y. Seborg | Control mechanism for honing machines |
| | 2,403,546 | Jul. 09, 1946 | J.O. Olsen | Method and apparatus for honing |
| | 2,450,660 | Oct. 05, 1948 | G.W. Hardy | Method of Forming Propeller Hubs |
