| All Patents in class 82/131 |
Patents 31 -
45
of 49
      |
| Number | Date | Patentee | Title | Type |
| 2,093,743 | Sep. 21, 1937 | E.C. Steiner | Boring Head | boring heads |
| 2,269,641 | Jan. 13, 1942 | R.M. Woytych | Machine Tool | horizontal boring mill attachments |
| 2,273,807 | Feb. 17, 1942 | R.m. Woytych | Speed Change Gearing | metalworking speed changing mechanisms |
| 2,325,294 | Jul. 27, 1943 | R.M. Woytych | Machine tool | horizontal boring mills |
| 2,489,719 | Nov. 29, 1949 | H.E. Myers | Boring Head With Facing Feed | boring heads |
| 2,593,124 | Apr. 15, 1952 | G. Eaton | Machine for manufacturing gate-valve wedges | metalworking machines |
| 2,831,386 | Apr. 22, 1958 | R.M. Woytych | Continuous Feed Facing Attachment for Machine Tools | horizontal boring mill attachments |
| 2,845,312 | Jul. 29, 1958 | R.M. Woytych | Mount for Machine Tool Work Support | horizontal boring mill attachments |
| 2,901,935 | Sep. 01, 1959 | A.P. Keller, Jr., I.C. Simon | Facing heads | facing heads |
| 3,180,187 | Apr. 27, 1965 | E.L. McFerren | Facing Head Attachment | facing heads |
| 3,371,559 | Mar. 05, 1968 | J.A. Scholl | Means for automatic tool feed and retraction control of boring and facing heads | boring heads |
| 3,599,517 | Aug. 17, 1971 | J. Müller | Boring and facing head for machine tools | boring heads |
| 3,744,352 | Jul. 10, 1973 | J.A. Scholl | Boring and facing apparatus | boring heads |
| 4,004,332 | Jan. 25, 1977 | W.W. Wawrzyniak | Facing Head | facing heads |
| 4,184,391 | Jan. 22, 1980 | O. Eckle | Facing and Boring Head | facing heads |
