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| Patents for Charles B. Knapp | |||||
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| Number | Date | Patentee | Title | Type | |
| 63,532 | Apr. 02, 1867 | C.B. Knapp | Improvement in boring machines | dovetailing machines | |
| D4,302 | Aug. 23, 1870 | C.B. Knapp | Design for joining wood | dovetailing machines | |
| 122,390 | Jan. 02, 1872 | N.S. Clement, C.B. Knapp | Improvement in machines for dovetailing | dovetailing machines | |