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| All Patents in class 92/48 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 876,543 | Jan. 14, 1908 | B.M. Hanson | Friction Clutch | ||
| 1,044,678 | Nov. 19, 1912 | C.J. Manning | Recording Low Pressure Gage | ||
| 2,192,117 | Feb. 27, 1940 | D.D. Wile | Control Device | ||