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| All Patents in class 256/72 | |||||
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| Number | Date | Patentee | Title | Type | |
| 210,250 | Nov. 26, 1878 | J.N. Greene | Improvement in street-signs | ||
| 780,586 | Jan. 24, 1905 | C.H. Thurston | Wire Fabric | ||
| 2,859,990 | Nov. 11, 1958 | G.J. Derrig | Railing Structure | railings | |