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| Patents for De Vlieg Machine Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,849,902 | Sep. 02, 1958 | A.N. Sweeny, C.B. De Vlieg | Presetting boring bar and tool holder | facing heads | |
| 3,292,238 | Dec. 20, 1966 | C.B. De Vlieg, A.N. Sweeny | Adjustable cutting tool | boring bars | |