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| Patents for Nicholas Helwig | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,034,795 | Aug. 06, 1912 | N. Helwig | Calipers | indicating calipers | |
| 1,039,055 | Sep. 17, 1912 | N. Helwig | Marking-Gage | wheeled marking gauges | |