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| All Patents in class 33/664 | |||||
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| Number | Date | Patentee | Title | Type | |
| 381,560 | Apr. 24, 1888 | J. Krumscheid | Multiple Dividers | dividers | |
| 819,926 | May 08, 1906 | A. Robbins | Spacing and Dividing Instrument | special purpose gauges | |
| 1,428,582 | Sep. 12, 1922 | F.W. Dietz | Device for Drwaing Parallel Lines | dividers | |