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| Patents for Gerard A. De Vlieg | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,823,032 | Sep. 15, 1931 | G.A. De Vlieg | Tool Holder | drilling and boring tool holders | |
| 1,883,611 | Oct. 18, 1932 | G.A. De Vlieg | Tool Holder | drilling and boring tool holders | |