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| Patents for Darling & Schwartz | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 9,976 | Aug. 30, 1853 | S. Darling | Apparatus for Grinding & Shaping Metals | |
 | 18,327 | Oct. 06, 1857 | S. Darling | Manufacture of Metallic Squares | |
 | 34,248 | Jan. 28, 1862 | G.F. Evans | Improvement in Plane-Stocks | |