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| Patents for C. Harvey Knapp | |||||
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| Number | Date | Patentee | Title | Type | |
| 867,724 | Oct. 08, 1907 | J.P. Hedstrom | Adjustable cam | saw sharpening machines | |
| 884,385 | Apr. 14, 1908 | J.P. Hedstrom | Saw-sharpening machine | saw sharpening machines | |