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| All Patents in class 235/70A | |||||
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| Number | Date | Patentee | Title | Type | |
| 815,509 | Mar. 20, 1906 | E.W. Campagna | Measuring Instrument | lumber rules | |
| 1,145,042 | Jul. 06, 1915 | J.M. Spitzglass | Calculating Device | scales | |
| 1,145,706 | Jul. 06, 1915 | E.D. Schulte | Computing Rule | ||