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| Patents for C. D. Howe | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 403,455 | May 14, 1889 | E.M. Birdsall | Valve Gear | |
| 406,262 | Jul. 02, 1889 | G.T. Chester | Barrel-hoop | ||
 | 410,161 | Sep. 03, 1889 | C. Hammelmann | Portable forge | |
 | 415,439 | Nov. 19, 1889 | E.M. Birdsall | Traction Engine | |