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Thomas Watson, chairman of IBM ; 1943
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| Number | Title | Issue Date |
| 4585133 | Coupler for convertible rail-highway semi-trailer A convertible semi-trailer for highway and railroad modes of travel includes a coupler device to releasably couple adjacent vehicles end-to-end to form a train for the railroad mode. The coupler includes a male member extending from the end of one of the ... | 04/29/1986 |