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| All Patents in class 60/551 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,847,829 | Aug. 19, 1958 | J.N. Gladden | Power Braaking System | vehicle brakes | |
| 2,959,450 | Nov. 08, 1960 | C.E. Rees, Jr., J.N. Gladden | Power Braking System and Control Unit Therefor | vehicle brakes | |