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| Patents for John Patrick Hedstrom | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 867,723 | Oct. 08, 1907 | J.P. Hedstrom | Machine for sharpening saw-teeth | |
 | 867,724 | Oct. 08, 1907 | J.P. Hedstrom | Adjustable cam | |
 | 884,385 | Apr. 14, 1908 | J.P. Hedstrom | Saw-sharpening machine | |
 | 930,178 | Aug. 03, 1909 | J.P. Hedstrom | Saw-sharpening machine | |