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| All Patents in class 407/61 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,730,845 | Jan. 17, 1956 | H. Ernst | Centerless Grinding Machine and Method | centerless grinders | |
| 2,761,196 | Sep. 04, 1956 | C.O. Graves | Face Mill | milling machine cutters | |
| 2,782,490 | Feb. 26, 1957 | C.O. Graves | Milling Cutter | milling machine cutters | |
| 3,742,565 | Jul. 03, 1973 | R.B. Baldwin, F.K. Zwald, C.E. Boboltz | Rotary cutter | cutterheads | |