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| All Patents in class 72/31.02 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,984,627 | Dec. 18, 1934 | J.Y. Blazek, R.G. Anderson | Machine for detecting and correcting errors in articles | ||
| 3,343,574 | Sep. 26, 1967 | L.D. Mersek | Wire Straightening Unit | wire straightening machines | |