| All Patents in class 451/28 |
Patents 1 -
10
of 31
      |
| Picture | Number | Date | Patentee | Title |
 | 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 |
 | 47,527 | May 02, 1865 | J. Dodge | Grinding and Polishing Metals |
| | RE5,378 | Apr. 29, 1873 | R. Dimes | Processes and Apparatus for Stippling Metallic Surfaces |
 | 139,772 | Jun. 10, 1873 | J.W. Cole | Improvement in processes of grinding journal boxes or bearings |
| | 1,647,130 | Nov. 01, 1927 | L.R. Heim | Art of Grinding |
| | 1,904,304 | Apr. 18, 1933 | R.E. Flanders | Method and Machine for Grinding Chasers |
 | 2,019,677 | Nov. 05, 1935 | G.T. Huxford | Surface grinder |
 | 2,036,658 | Apr. 07, 1936 | B.F. Stowell | Automatic grinding machine |
| | 2,111,271 | Mar. 15, 1938 | L.F. Nenninger | Apparatus for Lapping |
