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| All Patents in class 303/54 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,585,038 | May 18, 1926 | B.A. Linderman | Pressure-control valve | vehicle brakes | |
| 2,959,450 | Nov. 08, 1960 | C.E. Rees, Jr., J.N. Gladden | Power Braking System and Control Unit Therefor | vehicle brakes | |