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Wilbur Wright ; 1901
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| Number | Title | Issue Date |
| 3931989 | Connecting device for front and rear frame of tricycle A tricycle having a front frame supported with one front wheel and a rear frame supported with two rear wheels, wherein the front frame is connected with the rear frame on the axis longitudinal of the tricycle in the relation that the front frame is capab... | 01/13/1976 |