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| Patents for Howard R. De Vlieg | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,652,634 | Sep. 22, 1953 | H.R. De Vlieg | Presetting device for cutting tools | ||
| 2,654,610 | Oct. 06, 1953 | H.R. De Vlieg | Offset boring head | boring heads | |
| 2,771,798 | Nov. 27, 1956 | H.R. De Vlieg | Grooving or facing head | milling machine cutters | |