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| Patents for Patrick J. Conroy | |||||
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| Number | Date | Patentee | Title | Type | |
| 879,532 | Feb. 18, 1908 | L. De Forest | (Vacuum Tube) | electronic circuitry and apparatus | |
| 936,422 | Oct. 12, 1909 | F.W. Derbyshire | Tool Rest for Watchmakers' Lathe | watchmakers lathes | |