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| All Patents in class 33/493 | |||||
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| Number | Date | Patentee | Title | Type | |
| 160,904 | Mar. 16, 1875 | G.S. Hastings | Improvement in Measuring Rules | folding rules | |
| 1,355,808 | Oct. 19, 1920 | E.J. Bryant | Precision Square | squares | |