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During the 19th century American inventors sought patents on self-propelled road machines. This steam-driven mechanical contraption was conceived by Zadoc Dederick and Isaac Grass from Newark, New Jersey, who said, "the pivots, cranks and connecting rods will produce an alternately-stepping motion". They were awarded a patent in 1868.
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TOP22166674
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達志影像
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186819thageamericanapparatusappliedartartworkbizarrebwcenturycontraptiondesigndiagramdrawingdrivenengineeringengineeringequipmenterahistorichistoricalhistoryillustrationinventionmachinemachinemechanicalmechanicaloddofficepatentpatentpeculiarpoweredquirkyroadsciencescienceself-propelledself-propellingstatessteamsteamsteam-drivensteam-poweredstrangesystemtechnologicaltechnologyunitedunusualususavictorianvictorianvictorianvictorianawackyweird