| Patents for Barnes Drill Co. |
Patents 16 -
30
of 144
      |
| Number | Date | Patentee | Title | Type |
| 1,783,019 | Nov. 25, 1930 | A.M. Johnson | Honing machine | honing machines |
| 1,838,945 | Dec. 29, 1931 | A.M. Johnson | Automatic machine tool | nut or bolt making machines |
| 1,838,995 | Dec. 29, 1931 | W.M. Fairbairn, A.M. Johnson | Spindle feed mechanism for machine tools | nut or bolt making machines |
| 1,872,746 | Aug. 23, 1932 | A.M. Johnson | Honing machine | honing machines |
| 1,877,881 | Sep. 20, 1932 | A.M. Johnson | Honing machine | honing machines |
| 1,909,766 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool | tapping machines |
| 1,909,767 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool | tapping machines |
| 1,917,831 | Jul. 11, 1933 | W.M. Fairbairn | Machine tool | tapping machines |
| 1,917,842 | Jul. 11, 1933 | A.M. Johnson | Drilling machine spindle | drill presses |
| 1,922,246 | Aug. 15, 1933 | A.M. Johnson | Machine tool | honing machines |
| 1,929,814 | Oct. 10, 1933 | W.M. Fairbairn, F.M. Hanna | Feed tripping mechanism for drilling machines | drill presses |
| 1,942,927 | Jan. 09, 1934 | C.O. Holland, A.M. Johnson | Hydraulically actuated indexing mechanism | indexers and dividers |
| 1,945,044 | Jan. 30, 1934 | W.M. Fairbairn, A.M. Johnson | Honing machine | honing machines |
| 1,945,045 | Jan. 30, 1934 | A.M. Johnson | Honing machine | honing machines |
| 1,948,115 | Feb. 20, 1934 | A.M. Johnson | Fluid pressure feed for drilling machine | drill presses |
