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| Patents for Austin Hart | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 61,855 | Feb. 05, 1867 | W. Nash | Improved saw set | |
 | 81,608 | Sep. 01, 1868 | J.P. Curtiss | Machine for Grinding Metal Articles | |
 | 186,998 | Feb. 06, 1877 | H.A. Foss | Cutter Adjustment with a Differential Screw | |
 | 550,144 | Nov. 19, 1895 | A.B. Stone | Wrench | |