| All Patents in class 451/28 |
Patents 1 -
15
of 31
      |
| Number | Date | Patentee | Title | Type |
| 21,746 | Oct. 12, 1858 | J. Dodge | Grinding and polishing knives | |
| 39,782 | Sep. 01, 1863 | T. Smith, J.A. Stafford | Improved Machine for Grinding Half Round Files | files |
| 47,527 | May 02, 1865 | J. Dodge | Grinding and Polishing Metals | polishing and buffing machinery |
| RE5,378 | Apr. 29, 1873 | R. Dimes | Processes and Apparatus for Stippling Metallic Surfaces | polishing machines |
| 139,772 | Jun. 10, 1873 | J.W. Cole | Improvement in processes of grinding journal boxes or bearings | machine making |
| 1,647,130 | Nov. 01, 1927 | L.R. Heim | Art of Grinding | grinding machines |
| 1,904,304 | Apr. 18, 1933 | R.E. Flanders | Method and Machine for Grinding Chasers | tool grinders |
| 2,019,677 | Nov. 05, 1935 | G.T. Huxford | Surface grinder | surface grinders |
| 2,036,658 | Apr. 07, 1936 | B.F. Stowell | Automatic grinding machine | grinders |
| 2,111,271 | Mar. 15, 1938 | L.F. Nenninger | Apparatus for Lapping | lapping machines |
| 2,270,590 | Jan. 20, 1942 | A.M. Johnson | Honing machine | honing machines |
| 2,436,466 | Feb. 24, 1948 | J.C. Wilson | Method and Apparatus for Grinding and Lapping | surface grinders |
| 2,534,941 | Dec. 19, 1950 | W.G. Baldenhofer | Method and apparatus for grinding | profile and contour grinders |
| 2,554,079 | May 22, 1951 | J.C. Wilson | Method and Apparatus for Continuous Form Grinding | surface grinders |
| 2,561,004 | Jul. 17, 1951 | W.G. Baldenhofer, J.C. Wilson | Method and Apparatus for Grinding | surface grinders |
