| All Patents in class 74/22R |
Patents 31 -
36
of 36
      |
| Number | Date | Patentee | Title | Type |
| 2,436,493 | Feb. 24, 1948 | R.H. Shepard | Mechanical Lubricator | industrial machine lubrication |
| 2,479,622 | Aug. 23, 1949 | A.M. Johnson | Control mechanism for honing machines | honing machines |
| 2,645,952 | Jul. 21, 1953 | W.S. Bunnell | Deep Drilling Attachment | lathe tools |
| 2,646,685 | Jul. 28, 1953 | H.E. Willitts | Shaft vibrator | sanding machines |
| 2,869,402 | Jan. 20, 1959 | W.S. Bunnell | Deep Drilling Attachment | metal lathe accessories and attachments |
| 3,363,700 | Jan. 16, 1968 | F.C. Bogusch, Jr. | Rotary and hammer drill | handheld power drills |
