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| Patents for Albert Hargraves | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,404,118 | Jan. 17, 1922 | A. Hargraves | Solid Tire Regrooving Tool | ||
| 1,442,612 | Jan. 16, 1923 | A. Hargraves | Solid Tire Grooving Machine | ||