Tsiku la International Museum likuyandikira mu May, chochitika chapadera chomwe chachititsa chidwi kwambiri mbiri ya njinga yamagetsi. Tiyeni tiwunikenso ulendo wodabwitsawu, kuyambira patent kupita kumakampani. Ngakhale kuti nkhaniyi ndi yayitali, tiyang'ana pa mfundo zazikuluzikulu ndikukutengerani gawo lililonse lofunikira pakupanga njinga yamagetsi.
Mu 1885, Ogden Bolton adachita upainiya wolunjika-panjinga yam'mbuyo{2}}panjinga yamagetsi yapakatikati ndipo adachita umwini wa batire-njinga yoyendera mphamvu, kuzindikiritsa kuyambika kwa luso la njinga yamagetsi yamagetsi.
Kumayambiriro kwa zaka za m’ma 1900, malo opangira njinga zamagetsi anapita patsogolo kwambiri. Mathew J. Steffens adakwanitsa kupanga patent ya gudumu lakumbuyo ndi lamba, zomwe zidabweretsa luso panjinga yamagetsi yamagetsi. Panthawiyi, a John Schnepf adapereka chilolezo cha "rola{4}}mtundu wakumbuyo-kugunda kwa magudumu-kuyendetsa njinga yamagetsi," kamangidwe kamene kamapititsa patsogolo luso laukadaulo wa njinga zamagetsi.
Ma Patent awa ndi odabwitsa kwambiri, ndipo adagwira ntchito yayikulu m'zaka zambiri zikubwerazi. Mwachitsanzo, patent ya Mathew J. Steffens ya wheel wheel ndi belt drive idagwiritsidwa ntchito kwambiri pama brake system, pomwe John Schnepf's patent ya "roller{2}}mtundu wakumbuyo-kugunda kwa magudumu-njinga yamagetsi yoyendetsedwa" idalimbikitsa kukula kwa makina owunikira ma jenereta ndi zida zotumizira. Pakatikati mwa zaka za m'ma 1900, Jesse D. Tucker adapanga bwino injini yoyamba yochitira patenti ya freewheeling, ndikuyika maziko olimba kuti apititse patsogolo luso laukadaulo wa njinga zamagetsi.
