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| Patents Granted on 1939-09-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-383,970 | Sep. 12, 1939 | W.C. Tucker | Shearing machine device | metal shearing machines | |
| 2,172,823 | Sep. 12, 1939 | A. Von Wangenheim | Control Device | temperature controls | |
| 2,172,999 | Sep. 12, 1939 | W.G. Hoelscher | Electrically Controlled Automatic Lathe | automatic lathes | |
| 2,173,074 | Sep. 12, 1939 | M. Romaine | Broaching Tool | broaches | |