| All Patents in class 451/49 |
Patents 1 -
10
of 31
      |
| Picture | Number | Date | Patentee | Title |
| | 104,492 | Jun. 21, 1870 | J.M. Poole | Machine for Grinding Rollers |
| | 1,271,495 | Jul. 02, 1918 | F.A. Ward | Method for Grinding Spline Shafts and Other Interrupted Cycindrical Bodies |
 | 1,273,016 | Jul. 16, 1918 | F.A. Ward | Splined shaft |
| | 1,281,366 | Oct. 15, 1918 | L.R. Heim | Method of Grinding Hardened Rolls |
| | 1,647,129 | Nov. 01, 1927 | L.R. Heim | Grinding |
| | 1,647,130 | Nov. 01, 1927 | L.R. Heim | Art of Grinding |
| | 1,647,131 | Nov. 01, 1927 | L.R. Heim | Grinding |
| | 1,670,717 | May 22, 1928 | S. Einstein | Method of Grinding |
| | 1,707,708 | Apr. 02, 1929 | J.E. Caster | Process for the Production of Spherical Articles |
 | 1,708,491 | Apr. 09, 1929 | C.R. Alden | Method of finishing ball bearings |
