| All Patents in class 33/DIG.002 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 2,259,472 | Oct. 21, 1941 | C. Johnson | Duplicator for machine tools | milling machine accessories |
| 2,372,427 | Mar. 27, 1945 | C. Johnson | Machine tool control | milling machine accessories |
| 2,590,151 | Mar. 25, 1952 | W.J. Bryant, H.H. Gates, T.H. Ljunggren | Bore gauge head | grinding attachments |
| 2,777,257 | Jan. 15, 1957 | A.M. Johnson | Hone with pressure actuated gage | honing machines |
| 4,129,949 | Dec. 19, 1978 | R.P. Callaghan, Jr. | Height Gage | |
| 5,347,723 | Sep. 20, 1994 | G.W. Russell | Air Bearing Control System | |
