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| All Patents in class 29/DIG.92 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,440,616 | Jan. 02, 1923 | J.J. Mikshel | Friction Cutting Machine | ||
| 3,893,355 | Jul. 08, 1975 | C.R. Maastricht | Coolant Supply System for Cutting Tools in a Machine Tool | ||