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| All Patents in class 5/52 | |||||
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| Number | Date | Patentee | Title | Type | |
| 185 | Apr. 29, 1837 | L. Hedge | Double-Centered Joint for Rules | folding rule joints | |
| 130,664 | Aug. 20, 1872 | J.J. Russ | Improvement in sofa-beds | ||