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| All Patents in class 301/73 | |||||
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| Number | Date | Patentee | Title | Type | |
| 335,964 | Feb. 09, 1886 | R. Scheidler | Wheel | traction engine wheels | |
| 575,107 | Jan. 12, 1897 | T. Corscaden | Sheet-metal pulley | industrial machine pulleys and belt drive mechanisms | |
| 633,282 | Sep. 19, 1899 | H.C. Clay | Traction Wheel | traction engine wheels | |