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| All Patents in class 303/48 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 88,929 | Apr. 13, 1869 | G. Westinghouse, Jr. | Improvement in steam-power-brake devices | |
 | 1,937,244 | Nov. 28, 1933 | G.M. Pelton | Control means for dogging mechanism | |
| 2,959,450 | Nov. 08, 1960 | C.E. Rees, Jr., J.N. Gladden | Power Braking System and Control Unit Therefor | ||