| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 451/197 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 1,722,386 | Jul. 30, 1929 | C.H. Norton | Centerless Grinding Machine | grinding machines | |
| 1,722,387 | Jul. 30, 1929 | C.H. Norton | Centerless Grinding Machine | grinding machines | |
| 1,722,388 | Jul. 30, 1929 | C.H. Norton | Method of Grinding Small Cylindrical Objects | grinding machines | |
| 1,782,480 | Nov. 25, 1930 | E.R. Seward | Centerless Grinding Machine | grinding machines | |
| 1,919,144 | Jul. 18, 1933 | C. Booth | Grinding Machine | grinding machines | |