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| All Patents in class 408/179 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,044,323 | Jul. 17, 1962 | A.N. Sweeny | Adjustable boring head | boring heads | |
| 3,195,376 | Jul. 20, 1965 | W. Bader | Boring Head | boring heads | |
| 3,730,636 | May 01, 1973 | S. Mizoguchi | Boring Head | boring heads | |
| 4,043,696 | Aug. 23, 1977 | G. Wohlhaupter | Micrometer Boring Head | boring heads | |
| 4,162,867 | Jul. 31, 1979 | D.W. Barton, R.A. Rhinefrank, D.J. Calcaterra | Dual Cutter Boring Head | boring heads | |