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| All Patents in class 318/674 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,233,113 | Feb. 25, 1941 | B.J. Smith, Jr. | Radio Receiving Apparatus | radios | |
| 2,422,448 | Jun. 17, 1947 | W. Trible | Remote Control Means for Speed Change Mechanism | milling machines | |
| 2,908,852 | Oct. 13, 1959 | R.M. Henderson | Multiple Unit Hump Control | diesel locomotives | |