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| Patents for Canadian Hart Wheels, Ltd. | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-102,411 | Dec. 04, 1906 | G. Hart | Grinding wheel | grinding wheels | |
| 1,254,183 | Jan. 22, 1918 | J.F. Williams | Machine to Mold Emery Wheels | molding machines | |