| All Patents in class 408/180 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 2,517,738 | Aug. 08, 1950 | C. Tree | Taper Boring Head | boring heads |
| 2,540,520 | Feb. 06, 1951 | J.H. Hoern | Machine | horizontal drilling machines |
| 2,716,360 | Aug. 30, 1955 | W.D. Walters, S.A. Cogsdill | Deburring Tool | deburring tools |
| 3,021,733 | Feb. 20, 1962 | S.A. Cogsdill | Cutting Tool | boring heads |
| 3,044,323 | Jul. 17, 1962 | A.N. Sweeny | Adjustable boring head | boring heads |
| 3,323,393 | Jun. 06, 1967 | F.H. Soykan | Four-Link Boring Bar | |
| 4,043,229 | Aug. 23, 1977 | R.M. Ortlieb | Self-Retracting Tool | drilling and boring tool holders |
| 4,224,846 | Sep. 30, 1980 | W. Gerk, D. Eysel | Turning Boring Head with a Tool for Radial Adjustment | boring heads |
