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| Patents for Hart Emery Wheel Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 201,778 | Mar. 26, 1878 | G. Hart | Emery Wheel | grinding wheels | |
| 226,066 | Mar. 30, 1880 | G. Hart | Emery-wheel | grinding wheels | |
| 275,561 | Apr. 10, 1883 | S.T. Wray | Polishing or buffing wheel | grinding wheels | |
| 338,787 | Mar. 30, 1886 | S.C. Rogers | Saw-filing machine | sharpening machines | |
| RE10,937 | Jun. 05, 1888 | S.C. Rogers | Saw-filing machine | saw sharpening machines | |
| 945,526 | Jan. 04, 1910 | G. Hart | Grinding-wheel | grinding wheels | |