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| Patents for W. B. Corwin | |||||
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| Number | Date | Patentee | Title | Type | |
| 296,053 | Apr. 01, 1884 | Z.C. Phillips | Boring-machine | portable timber mortisers | |
| 310,041 | Dec. 30, 1884 | S. Forrester | Pencil-sharpener | pencil sharpeners | |
| 332,146 | Dec. 08, 1885 | S. Forrester | Pencil-sharpener | pencil sharpeners | |
| D16,631 | Apr. 20, 1886 | T. Bakewell | Design for an Ax | axes | |
| 404,811 | Jun. 04, 1889 | F. Wichelhaus | Cartridge Crimping Tool | pliers | |
| 421,391 | Feb. 18, 1890 | J.H. Dixon | Tool Attachment | hand drills | |
| 447,805 | Mar. 10, 1891 | R. Yanda | Calipers | calipers | |
| 460,590 | Oct. 06, 1891 | P. Meyer | Pliers | pliers | |
| 468,804 | Feb. 16, 1892 | G.P. Hobbs | Jar-Cap Spanner | jar wrenches | |
| 512,938 | Jan. 16, 1894 | D.W. Black | Sucker Rod Elevator and Wrench | wrenches | |
| RE11,459 | Dec. 18, 1894 | G.P. Woelfel | Pipe Wrench | pipe wrenches | |
| 538,994 | May 07, 1895 | G.P. Woelfel | Pipe Wrench | pipe tongs | |