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| Patents for William H. Halladay Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 254,869 | Mar. 14, 1882 | W.H. Halladay | Saw-sharpening machine | saw sharpening machines | |
| CA-15,491 | Sep. 19, 1882 | W.H. Halladay | Improvements on automatic saw-sharpeners | saw sharpening machines | |
| 381,775 | Apr. 24, 1888 | W.H. Halladay | Saw-sharpening machine | saw sharpening machines | |