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| All Patents in class 33/DIG.013 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,547,647 | Apr. 03, 1951 | G.N. Levesque | Straightedge | ||
| 2,581,264 | Jan. 01, 1952 | G.N. Levesque | Gauge | ||
| 2,633,642 | Apr. 07, 1953 | G.N. Levesque | Measuring Machine | ||